Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb11af54896e831a…

MALICIOUS

PDF

45.1 KB Created: 2021-06-03 04:53:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: cbe6864ba731450213e7239cfb9eb5ec SHA-1: c9152823c1fca7708c14e66364992908aa22a66f SHA-256: cb11af54896e831af8d21b5fb66ac75b3e13c5d11f83c72ec346f7ff65018171
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to game hacks and free spins, directing users to a malicious URL. The ML classifier strongly indicates maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to potentially malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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-daily-free-spins-link-2021-today-game-hack PDF link annotation
    • http://digilib.iailm.ac.id/repository/coin-master-hack-app-ios_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/2021-no-human-verification-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/offers-for-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/real-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-minecraft-codes_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/minecraft-pe-free-download-ios-no-jailbreak_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/roblox-place-rewards_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/how-to-change-your-name-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/hack-xp-net-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/minecraft-bedrock-free-with-java_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-hack-mobile_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/robux-for-surveys_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-robux-picture_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-roblox-clothes-templates_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-free-coins-spins_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/hacks-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/real-robux-codes_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-robux-obby_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_off00005256.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5256 24816 bytes
SHA-256: 5f40ec7f1d76c66a5a4da58e302b2cb8671fff1bdcaac38a3c229357be1250f2
font_01_sfnt_off00008b46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B46 19052 bytes
SHA-256: eaae1ca97f535f7f19a3027bb05b0c0b9ff144311ff5366650acbeeb70d65258

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