Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a8bf1682df3299f…

MALICIOUS

PDF

35.6 KB Created: 2021-06-18 12:52:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: c280396552b25dd1b3320c7aff66bad5 SHA-1: e411faec3b3f208f95be49064db7f01b38980dde SHA-256: 0a8bf1682df3299f00e658abce346894006b3a11fe715a76e17592ea75911b6e
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document employs a common lure of 'free Robux' and game hacks to entice users. It contains numerous embedded URLs, with a primary redirector at http://netcdn.co/app/431946152/free-robux-no-human-verification-or-survey-2021-real-game-hack, which likely leads to malicious content or further phishing attempts. The ML classifier strongly flagged this PDF as malicious, supporting the observed lure and redirection behavior.

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/free-robux-no-human-verification-or-survey-2021-real-game-hack PDF link annotation
    • http://lib.untad.ac.id/repository/roblox-serverside-executor-free_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-card-hack-app_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/hack-robux-ilimit_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/robux-for-surveys_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/tiktok-free-wala_GM835599320.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-hack-generator-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/robux-free-c_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/150-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/minecraft-for-free-games_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/hack-client_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-hack-2021-ios-download_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/best-roblox-hack-executer_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/games-like-roblox-but-better-and-free_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-hack-spins-and-coins-unlimited-free-download_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/robux-cheat_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/minecraft-hacked-client-18_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-codes-generator_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_off00002fc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FC4 22732 bytes
SHA-256: d0a61abc99d477c99709d526e991345223b3ff1710e63377d2336436840111eb
font_01_sfnt_off000062d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62D0 20104 bytes
SHA-256: cf5f4946c848dec61b294ff03e498fb82d64c52c6f229c216f50446297c69c38

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