Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcb109152f046770…

MALICIOUS

PDF

34.5 KB Created: 2021-06-20 09:20:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 82d2c26fa43455d15c69b9fa84202b8f SHA-1: 50673b4087eb75071e016da9e65781549b5a7cc1 SHA-256: dcb109152f0467705da438fdc7f45fc6797f9e8fd81f928bca1a6c1f98dc3836
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple embedded URLs that redirect to sites offering game hacks and generators, such as 'roblox-download-android-free-game-hack'. This indicates a lure-based attack pattern designed to trick users into visiting malicious sites. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/roblox-download-android-free-game-hack PDF link annotation
    • http://opac.kolejkrim.edu.my/repository/hack-para-tener-robux-como-tener-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-robux-20210_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-to-hack-robux-in-roblox-with-cheat-engine_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-hack-tool-v1-9_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/haktuts-coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-custom-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/roblox-booga-booga-hacks-no-script-needed_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/cheat-codes-in-workout-simulator-i-roblox_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/roblox-free-colouring-pages_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-to-hack-with-cheat-engine-on-roblox_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-credits-galaxy-roblox_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/can-you-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-robux-cards-that-havent-been-used-yet_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-old-roblox-accounts_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
font_00_sfnt_off00002ee6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EE6 22668 bytes
SHA-256: 0387bd700c6cfea662067a1e0b8f09da38206171f2c38b5fb01b436b9c35951a
font_01_sfnt_off00006131.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6131 19276 bytes
SHA-256: a035cd2516ada0d319c9b0acbd2ea14e78b6559ffa8a72b9fad5ecbd6ea58441

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