Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7946d423fbb1c25…

MALICIOUS

PDF

45.3 KB Created: 2021-06-03 05:01:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 96bc4c55c568c48a838c36dbb1a5e5e2 SHA-1: d16e04f254084245cdb78b4a7b34b05e7454392f SHA-256: b7946d423fbb1c25ddc02edab14f9cd4df387e72e370db9dab7db9a797e21796
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free generators'. The primary malicious URL identified is https://netcdn.online/app/406889139/coin-master-hack-apk-with-fb-login-game-hack. The document body, though partially corrupted, contains references to this URL and appears to be a lure for users seeking cheats or exploits for games like Coin Master. No scripts were extracted, but the embedded links and heuristic firings strongly indicate a malicious redirector workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.online/app/406889139/coin-master-hack-apk-with-fb-login-game-hack In PDF document text
    • http://muslib.unmus.ac.id/repository/como-hackear-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/blogspot-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-to-hack-coin-master-without-root_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-robux-earn_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/install-free-game-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-followers-on-tiktok-no-human-verification_GM835599320.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-add-mods-to-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/is-minecraft-free-on-switch_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-free-redeem-code_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-admin-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-do-you-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/minecraft-free-download-mac_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-daily-free-spins-link-app-download_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-robux-giveaway-live_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/minecraft-fly-hack_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/pubg-uc-murah_GM1330123889.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/no-scam-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051b8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51B8 25600 bytes
SHA-256: 6ac9d5c54cda07cb334457e484a3492c66e27cd82830b75417f2d17b890afebb
font_01_sfnt_off00008ca7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CA7 18868 bytes
SHA-256: 5fb514d72b6a3127ebf70d681bf63e452f11a73e305fe10841396b7649d51be9

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