PDF Reader(KDAN PDF): Edit PDF

Kdan Mobile Software Ltd. · Build 3.46.1

com.kdanmobile.android.pdfreader.google.pad
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Static analysis completeScanned 2026-11-03 06:36 UTC

Static checks identify review items, not a guarantee of safety.

Backend checks: 5 unauthenticated read checks against backends referenced in this build — 2 refused access, 1 answered, 2 could not be determined. Each check describes one request at the recorded scan time and does not establish the backend's current state. An undetermined result is not evidence that the backend is closed.

Overview

Review needed

1 high or critical finding category to review

PDF Reader(KDAN PDF): Edit PDF (com.kdanmobile.android.pdfreader.google.pad) scored grade D, 36 out of 100, in a static scan of version 3.46.1 on 2026-11-03. It has 1 high or critical finding category of 6, across 6 occurrences. One finding was confirmed live: an anonymous request reached a backend the app references and it answered without authentication. No credential was used and no stored data was read. 20 tracking SDKs are present in the package, which describes what ships, not what runs or what it sends. This is static analysis of a single build: it does not observe the app running and does not establish that any data is exposed.

Finding categories66 occurrences
High / critical1Category count
Tracking SDKs20Presence, not observed traffic
Assessment score36 / 100Grade D

Start with these findings

criticalFirebase Realtime Database reference — confirmed publicly readable1 occurrence

Interpretation & review guidance

A Firebase Realtime Database URL. Nearly every app that uses Firebase ships one. It's only an exposure if the database rules are world-readable — that's what live verification checks.

Remediation: Fix a publicly readable Firebase database →

Reference: CWE-200 · CWE-284 · MASVS-STORAGE-2 — what the control asks for, and other apps with the same finding.

Evidence
1 recorded occurrence in the analyzed APK. These are distinct stored findings, not a count of every source match.
Verification
1 historically verified occurrence at the recorded scan time. Current reachability is not established.
Open in all findingsRequest a correction
mediumShort signing key (RSA 1024-bit)1 occurrence

Interpretation & review guidance

The signing key is shorter than the modern 2048-bit RSA minimum. Short keys are cryptographically weaker; a release should re-key to at least RSA-2048 (or an EC key).

Remediation: Android app signing explained (v1, v2, v3 & Janus) →

Reference: CWE-326 · MASVS-CRYPTO-1 — what the control asks for, and other apps with the same finding.

Evidence
1 recorded occurrence in the analyzed APK. These are distinct stored findings, not a count of every source match.
Verification
Static detection; current reachability is not established.
Open in all findingsRequest a correction
lowAmazon S3 bucket reference1 occurrence

Interpretation & review guidance

A reference to an Amazon S3 bucket. Using cloud storage is normal — the risk exists only if the bucket allows anonymous listing/read, which requires a separate authorized assessment.

Reference: CWE-200 · CWE-284 · MASVS-STORAGE-2 — what the control asks for, and other apps with the same finding.

Evidence
1 recorded occurrence in the analyzed APK. These are distinct stored findings, not a count of every source match.
Verification
Static detection; current reachability is not established.
Open in all findingsRequest a correction
View all 6 categories

Privacy

40 requested permissions · 5 flagged high-risk classes.

Review privacy signals →

Build & components

122 components recorded. Certificate parsing does not validate APK signature integrity.

Inspect build evidence →
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Findings

6 categories · 6 occurrences. Severity totals describe categories. Expand a finding for interpretation and review guidance.

criticalFirebase Realtime Database reference — confirmed publicly readable1 occurrence

Interpretation & review guidance

A Firebase Realtime Database URL. Nearly every app that uses Firebase ships one. It's only an exposure if the database rules are world-readable — that's what live verification checks.

Remediation: Fix a publicly readable Firebase database →

Reference: CWE-200 · CWE-284 · MASVS-STORAGE-2 — what the control asks for, and other apps with the same finding.

Evidence
1 recorded occurrence in the analyzed APK. These are distinct stored findings, not a count of every source match.
Verification
1 historically verified occurrence at the recorded scan time. Current reachability is not established.

Evidence preview

Evidence type
Static string match
Representative location
resources.arsc
Recorded match
Pattern recorded; identifying value redacted.
Detector rule
firebase_db
Recorded file locations
  • resources.arsc

1 recorded findings have inspectable metadata. Duplicate matches may share a representative location.

Review whether this belongs to intended app functionality or a bundled library. A static match does not establish runtime impact.

Preview evidence and Pro tools

Search recorded evidence and save private review notes with Pro. $99/month plus applicable tax.

Link to categoryRequest a correction
mediumShort signing key (RSA 1024-bit)1 occurrence

Interpretation & review guidance

The signing key is shorter than the modern 2048-bit RSA minimum. Short keys are cryptographically weaker; a release should re-key to at least RSA-2048 (or an EC key).

Remediation: Android app signing explained (v1, v2, v3 & Janus) →

Reference: CWE-326 · MASVS-CRYPTO-1 — what the control asks for, and other apps with the same finding.

Evidence
1 recorded occurrence in the analyzed APK. These are distinct stored findings, not a count of every source match.
Verification
Static detection; current reachability is not established.

Evidence preview

Evidence type
Signing metadata
Representative location
META-INF/signing:key
Recorded match
RSA-1024
Detector rule
signing
Recorded file locations
  • META-INF/signing:key

1 recorded findings have inspectable metadata. Duplicate matches may share a representative location.

Review whether this belongs to intended app functionality or a bundled library. A static match does not establish runtime impact.

Preview evidence and Pro tools

Search recorded evidence and save private review notes with Pro. $99/month plus applicable tax.

Link to categoryRequest a correction
lowAmazon S3 bucket reference1 occurrence

Interpretation & review guidance

A reference to an Amazon S3 bucket. Using cloud storage is normal — the risk exists only if the bucket allows anonymous listing/read, which requires a separate authorized assessment.

Reference: CWE-200 · CWE-284 · MASVS-STORAGE-2 — what the control asks for, and other apps with the same finding.

Evidence
1 recorded occurrence in the analyzed APK. These are distinct stored findings, not a count of every source match.
Verification
Static detection; current reachability is not established.

Evidence preview

Evidence type
Static string match
Representative location
classes6.dex
Recorded match
Pattern recorded; identifying value redacted.
Detector rule
s3_path_url
Recorded file locations
  • classes6.dex

1 recorded findings have inspectable metadata. Duplicate matches may share a representative location.

Review whether this belongs to intended app functionality or a bundled library. A static match does not establish runtime impact.

Preview evidence and Pro tools

Search recorded evidence and save private review notes with Pro. $99/month plus applicable tax.

Link to categoryRequest a correction
lowFirebase Storage bucket reference1 occurrence

Interpretation & review guidance

A Firebase Cloud Storage bucket reference (the default <project>.appspot.com). Storing user files here is normal — it's only an exposure if the Storage security rules allow public read/list, which live verification tests.

Remediation: Fix a publicly readable Firebase database →

Reference: CWE-200 · CWE-284 · MASVS-STORAGE-2 — what the control asks for, and other apps with the same finding.

Evidence
1 recorded occurrence in the analyzed APK. These are distinct stored findings, not a count of every source match.
Verification
Static detection; current reachability is not established.

Evidence preview

Evidence type
Static string match
Representative location
resources.arsc
Recorded match
Pattern recorded; identifying value redacted.
Detector rule
firebase_storage_bucket
Recorded file locations
  • resources.arsc

1 recorded findings have inspectable metadata. Duplicate matches may share a representative location.

Review whether this belongs to intended app functionality or a bundled library. A static match does not establish runtime impact.

Preview evidence and Pro tools

Search recorded evidence and save private review notes with Pro. $99/month plus applicable tax.

Link to categoryRequest a correction
lowGoogle API key (client-shipped; restriction unverified)1 occurrence

Interpretation & review guidance

Android apps are designed to ship Google API keys in the client; Google restricts them by app signing certificate + enabled API. This is only a problem if the key is left unrestricted — presence alone is expected, not an exposure.

Remediation: How to store secrets in a mobile app (without hardcoding) →

Reference: CWE-798 · MASVS-STORAGE-1 — what the control asks for, and other apps with the same finding.

Evidence
1 recorded occurrence in the analyzed APK. These are distinct stored findings, not a count of every source match.
Verification
Static detection; current reachability is not established.

Evidence preview

Evidence type
Static string match
Representative location
resources.arsc
Recorded match
AIza•••••••• (21–40 chars, redacted)
Detector rule
google_api_key
Recorded file locations
  • resources.arsc

1 recorded findings have inspectable metadata. Duplicate matches may share a representative location.

Review whether this belongs to intended app functionality or a bundled library. A static match does not establish runtime impact.

Preview evidence and Pro tools

Search recorded evidence and save private review notes with Pro. $99/month plus applicable tax.

Link to categoryRequest a correction
infoApplication data is backup-enabled1 occurrence

Interpretation & review guidance

The app allows Android backups (android:allowBackup="true"). App data can then be extracted via adb backup on many devices — a concern if the app stores tokens or personal/health/payment data locally. Common and low-severity, but worth disabling for sensitive apps.

Reference: CWE-530 · CWE-312 · MASVS-STORAGE-1 · MASVS-STORAGE-2 — what the control asks for, and other apps with the same finding.

Evidence
1 recorded occurrence in the analyzed APK. These are distinct stored findings, not a count of every source match.
Verification
Static detection; current reachability is not established.

Evidence preview

Evidence type
Parsed app configuration
Representative location
AndroidManifest.xml
Recorded match
android:allowBackup="true"
Detector rule
manifest
Recorded file locations
  • AndroidManifest.xml

1 recorded findings have inspectable metadata. Duplicate matches may share a representative location.

Review whether this belongs to intended app functionality or a bundled library. A static match does not establish runtime impact.

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Search recorded evidence and save private review notes with Pro. $99/month plus applicable tax.

Link to categoryRequest a correction

Privacy signals

Capabilities and bundled software do not prove that data was collected or transmitted.

Requested permissions40
Flagged high-risk classes5
Detected SDKs20

Precise location Approx. location Camera Contacts Accounts

Requested permission inventory (40)
  • android.permission.ACCESS_ADSERVICES_AD_ID
  • android.permission.ACCESS_ADSERVICES_ATTRIBUTION
  • android.permission.ACCESS_ADSERVICES_CUSTOM_AUDIENCE
  • android.permission.ACCESS_ADSERVICES_TOPICS
  • android.permission.ACCESS_COARSE_LOCATION
  • android.permission.ACCESS_DOWNLOAD_MANAGER
  • android.permission.ACCESS_FINE_LOCATION
  • android.permission.ACCESS_NETWORK_STATE
  • android.permission.ACCESS_WIFI_STATE
  • android.permission.CAMERA
  • android.permission.CHANGE_WIFI_MULTICAST_STATE
  • android.permission.CHANGE_WIFI_STATE
  • android.permission.FOREGROUND_SERVICE
  • android.permission.FOREGROUND_SERVICE_DATA_SYNC
  • android.permission.GET_ACCOUNTS
  • android.permission.GET_TASKS
  • android.permission.INTERNET
  • android.permission.KILL_BACKGROUND_PROCESSES
  • android.permission.MANAGE_EXTERNAL_STORAGE
  • android.permission.PACKAGE_USAGE_STATS
  • android.permission.POST_NOTIFICATIONS
  • android.permission.READ_CONTACTS
  • android.permission.READ_MEDIA_AUDIO
  • android.permission.READ_MEDIA_IMAGES
  • android.permission.READ_MEDIA_VIDEO
  • android.permission.RECEIVE_BOOT_COMPLETED
  • android.permission.REORDER_TASKS
  • android.permission.USE_BIOMETRIC
  • android.permission.USE_FINGERPRINT
  • android.permission.VIBRATE
  • android.permission.WAKE_LOCK
  • android.permission.WRITE_CONTACTS
  • android.permission.WRITE_EXTERNAL_STORAGE
  • com.android.vending.BILLING
  • com.applovin.array.apphub.permission.BIND_APPHUB_SERVICE
  • com.google.android.c2dm.permission.RECEIVE
  • com.google.android.finsky.permission.BIND_GET_INSTALL_REFERRER_SERVICE
  • com.google.android.gms.permission.AD_ID
  • com.google.android.providers.gsf.permission.READ_GSERVICES
  • com.kdanmobile.android.pdfreader.google.pad.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

Data collection & flow (privacy signal, not part of the grade)

Data the app can access
Camera
Camera
Contacts
ContactsContacts (write)
Location
Approximate locationPrecise location
Personal info
Device accounts
Photos & files
All-files accessStorage (write)StoragePhotosVideosAudio files
Persistent identifiers (referenced in code)
Advertising ID (AAID)Android IDDevice ID / IMEI
Where it can go
Third parties present (17)
AppLovinChartboostGoogle AdMobInMobiMeta Audience NetworkMintegralPangle (ByteDance)TapjoyUnity AdsVungleYandex AdsironSourceGoogle AnalyticsGoogle Analytics for FirebaseGoogle Firebase AnalyticsGoogle Tag ManagerMeta / Facebook SDK
  • Approximate location, Precise location requested while 12 ad/attribution SDK(s) are present (AppLovin, Chartboost, Google AdMob +9 more) — location commonly feeds ad targeting.
  • Persistent-identifier APIs referenced in code (Advertising ID (AAID), Android ID, Device ID / IMEI) with 17 analytics/ad SDK(s) present — the mechanism used for cross-app profiling.
  • Camera, Contacts, Personal info, Photos & files data requested with third-party analytics/ad SDKs present.

This maps what the app can access (permissions it requests, identifier APIs its code references) to the third parties bundled in it. It reflects capability and SDK presence — not proof that a specific value was transmitted.

Data Safety comparison not recorded.

Trackers & SDKs (20 detected · privacy signal, not part of the grade)

Advertising
AppLovinChartboostGoogle AdMobInMobiMeta Audience NetworkMintegralPangle (ByteDance)TapjoyUnity AdsVungleYandex AdsironSource
Analytics
Google AnalyticsGoogle Analytics for FirebaseGoogle Firebase AnalyticsGoogle Tag ManagerMeta / Facebook SDK
Consent
Google UMP (consent)IAB TCF
Crash reporting
Google Crashlytics

Build & components

Scanned build 3.46.1. Store metadata may describe a newer release.

APK SHA-25605d61ecbe24b99f19474c20a48a4767effd6954512303d6b2bd48a9ffeab626d

Signing certificate (who signed this build — factual, not part of the grade)

Signer
KdanMobile.com self-signed
Scheme
V3V2
Key
RSA 1024-bit
Algorithm
sha1WithRSA
Validity
2012-12-13 → 3011-04-16
Cert SHA-256
85:f4:d8:b5:25:87:12:0e:fa:f4:b0:15:48:f2:3e:0a:53:1e:95:5e:33:ac:c0:f3:35:c1:a8:9e:70:c3:07:84

The certificate fingerprint identifies the parsed signing certificate. Knowing this public fingerprint does not establish ownership or validate the APK signature.

Signature integrity: not established by certificate parsing.

Component inventory

122 components. Advisory matching covers a curated set; no match is not proof that a component is vulnerability-free.

Bundled components and recorded advisory matches
ComponentVersionAdvisory matches
androidx.activity:activity1.9.2None recorded
androidx.activity:activity-compose1.9.2None recorded
androidx.activity:activity-ktx1.9.2None recorded
androidx.annotation:annotation-experimental1.4.1None recorded
androidx.appcompat:appcompat1.7.0None recorded
androidx.appcompat:appcompat-resources1.7.0None recorded
androidx.asynclayoutinflater:asynclayoutinflater1.0.0None recorded
androidx.autofill:autofill1.0.0None recorded
androidx.biometric:biometric1.1.0None recorded
androidx.browser:browser1.8.0None recorded
androidx.camera:camera-camera21.4.2None recorded
androidx.camera:camera-core1.4.2None recorded
androidx.camera:camera-lifecycle1.4.2None recorded
androidx.camera:camera-video1.4.2None recorded
androidx.camera:camera-view1.4.2None recorded
androidx.cardview:cardview1.0.0None recorded
androidx.compose.animation:animation1.9.1None recorded
androidx.compose.animation:animation-core1.9.1None recorded
androidx.compose.foundation:foundation1.9.1None recorded
androidx.compose.foundation:foundation-layout1.9.1None recorded
androidx.compose.material:material1.9.1None recorded
androidx.compose.material:material-icons-core1.7.8None recorded
androidx.compose.material:material-ripple1.8.2None recorded
androidx.compose.runtime:runtime1.9.1None recorded
androidx.compose.runtime:runtime-annotation1.9.1None recorded
androidx.compose.runtime:runtime-saveable1.9.1None recorded
androidx.compose.ui:ui1.9.1None recorded
androidx.compose.ui:ui-geometry1.9.1None recorded
androidx.compose.ui:ui-graphics1.9.1None recorded
androidx.compose.ui:ui-text1.9.1None recorded
androidx.compose.ui:ui-tooling1.9.1None recorded
androidx.compose.ui:ui-tooling-data1.9.1None recorded
androidx.compose.ui:ui-tooling-preview1.9.1None recorded
androidx.compose.ui:ui-unit1.9.1None recorded
androidx.compose.ui:ui-util1.9.1None recorded
androidx.constraintlayout:constraintlayout2.2.1None recorded
androidx.constraintlayout:constraintlayout-compose1.1.1None recorded
androidx.coordinatorlayout:coordinatorlayout1.1.0None recorded
androidx.core:core1.16.0None recorded
androidx.core:core-ktx1.16.0None recorded
androidx.core:core-viewtree1.0.0None recorded
androidx.credentials:credentials1.3.0None recorded
androidx.credentials:credentials-play-services-auth1.3.0None recorded
androidx.cursoradapter:cursoradapter1.0.0None recorded
androidx.customview:customview1.1.0None recorded
androidx.customview:customview-poolingcontainer1.0.0None recorded
androidx.databinding:viewbinding8.10.1None recorded
androidx.datastore:datastore1.1.1None recorded
androidx.datastore:datastore-core1.1.1None recorded
androidx.datastore:datastore-preferences1.1.1None recorded
androidx.documentfile:documentfile1.0.0None recorded
androidx.drawerlayout:drawerlayout1.1.1None recorded
androidx.dynamicanimation:dynamicanimation1.0.0None recorded
androidx.emoji2:emoji21.4.0None recorded
androidx.emoji2:emoji2-views-helper1.4.0None recorded
androidx.exifinterface:exifinterface1.3.7None recorded
androidx.fragment:fragment1.8.7None recorded
androidx.fragment:fragment-ktx1.8.7None recorded
androidx.graphics:graphics-path1.0.1None recorded
androidx.interpolator:interpolator1.0.0None recorded
androidx.legacy:legacy-support-core-ui1.0.0None recorded
androidx.legacy:legacy-support-core-utils1.0.0None recorded
androidx.legacy:legacy-support-v41.0.0None recorded
androidx.lifecycle:lifecycle-livedata2.9.0None recorded
androidx.lifecycle:lifecycle-livedata-core2.9.0None recorded
androidx.lifecycle:lifecycle-livedata-core-ktx2.9.0None recorded
androidx.lifecycle:lifecycle-livedata-ktx2.9.0None recorded
androidx.lifecycle:lifecycle-process2.9.0None recorded
androidx.lifecycle:lifecycle-runtime2.9.0None recorded
androidx.lifecycle:lifecycle-runtime-compose2.9.0None recorded
androidx.lifecycle:lifecycle-runtime-ktx2.9.0None recorded
androidx.lifecycle:lifecycle-service2.9.0None recorded
androidx.lifecycle:lifecycle-viewmodel2.9.0None recorded
androidx.lifecycle:lifecycle-viewmodel-compose2.9.0None recorded
androidx.lifecycle:lifecycle-viewmodel-ktx2.9.0None recorded
androidx.lifecycle:lifecycle-viewmodel-savedstate2.9.0None recorded
androidx.loader:loader1.0.0None recorded
androidx.localbroadcastmanager:localbroadcastmanager1.0.0None recorded
androidx.media:media1.0.0None recorded
androidx.navigation:navigation-common2.8.0None recorded
androidx.navigation:navigation-common-ktx2.8.0None recorded
androidx.navigation:navigation-fragment2.8.0None recorded
androidx.navigation:navigation-fragment-ktx2.8.0None recorded
androidx.navigation:navigation-runtime2.8.0None recorded
androidx.navigation:navigation-runtime-ktx2.8.0None recorded
androidx.print:print1.0.0None recorded
androidx.privacysandbox.ads:ads-adservices1.0.0-beta05None recorded
androidx.privacysandbox.ads:ads-adservices-java1.0.0-beta05None recorded
androidx.profileinstaller:profileinstaller1.4.0None recorded
androidx.recyclerview:recyclerview1.4.0None recorded
androidx.room:room-ktx2.6.1None recorded
androidx.room:room-runtime2.6.1None recorded
androidx.savedstate:savedstate1.3.0None recorded
androidx.savedstate:savedstate-compose1.3.0None recorded
androidx.savedstate:savedstate-ktx1.3.0None recorded
androidx.security:security-crypto1.1.0-alpha06None recorded
androidx.slidingpanelayout:slidingpanelayout1.2.0None recorded
androidx.sqlite:sqlite2.4.0None recorded
androidx.sqlite:sqlite-framework2.4.0None recorded
androidx.startup:startup-runtime1.1.1None recorded
androidx.swiperefreshlayout:swiperefreshlayout1.0.0None recorded
androidx.tracing:tracing1.2.0None recorded
androidx.tracing:tracing-ktx1.2.0None recorded
androidx.transition:transition1.5.0None recorded
androidx.vectordrawable:vectordrawable1.1.0None recorded
androidx.vectordrawable:vectordrawable-animated1.1.0None recorded
androidx.versionedparcelable:versionedparcelable1.1.1None recorded
androidx.viewpager2:viewpager21.1.0None recorded
androidx.viewpager:viewpager1.0.0None recorded
androidx.webkit:webkit1.13.0None recorded
androidx.window:window1.0.0None recorded
androidx.work:work-runtime2.9.1None recorded
androidx.work:work-runtime-ktx2.9.1None recorded
com.google.android.material:material1.12.0None recorded
com.google.dagger:dagger2.42None recorded
com.google.dagger:dagger-android2.42None recorded
com.google.dagger:dagger-lint-aar2.42None recorded
com.squareup.okhttp3:okhttp5.0.0None recorded
kotlinx:coroutines_android1.10.2None recorded
kotlinx:coroutines_core1.10.2None recorded
kotlinx:coroutines_play_services1.10.2None recorded
org.jetbrains.androidx.core:core-bundle1.0.0None recorded
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About this app · store information

About this app

The all-in-one document expert for reading, editing & signing PDFs on any device

Content ratingEveryone
Download size187.3 MB
Privacy policyPublished →

Screenshots

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Scan history

Each row is an observed scan. Gaps between scans do not establish how long a finding existed.

Scanned (UTC)BuildScoreGrade
2026-11-03 06:36 UTC3.46.136D

View changes between the last two scans →

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Exports describe the recorded assessment. Signed evidence proves origin and integrity, not completeness or safety.

SARIFFindings CSVCoverage JSONSigned evidenceSBOM

Coverage & gap matrix · Verify signed evidence

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apk-scanner.com exposure grade
Markdown
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