Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b3fa60d7977481a…

MALICIOUS

PDF

33.2 KB Created: 2021-07-04 19:21:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 12501b39b65bf8ac45695b6f83efd052 SHA-1: 396d9210c742ac7fd3168cb8dbba6eb646aec901 SHA-256: 8b3fa60d7977481a355220194b08ceab5cdc7db3c40e31d995c966aa215dfd21
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, primarily offering 'free Robux' or game hacks, which is a common lure for phishing or malware distribution. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' strongly indicates this malicious intent. While no scripts were explicitly extracted, the nature of the lures and the embedded URLs suggest a phishing or scam campaign, likely initiated via a spearphishing attachment.

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.tw/app/431946152/how-to-free-robux-game-hack PDF link annotation
    • https://www.fishboat.hr/files/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://fishboat.hr/files/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://fishboat.hr/files/da-hood-roblox-free-dowlond_GM431946152.pdfIn PDF document text
    • https://www.fishboat.hr/files/is-there-any-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://www.fishboat.hr/files/roblox-cheat-speed-run_GM431946152.pdfIn PDF document text
    • http://fishboat.hr/files/can-you-really-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://fishboat.hr/files/roblox-cheats-jailbreak_GM431946152.pdfIn PDF document text
    • http://fishboat.hr/files/www-robux-us_GM431946152.pdfIn PDF document text
    • http://fishboat.hr/files/hack-coin-master-dzooka_GM406889139.pdfIn PDF document text
    • http://fishboat.hr/files/roblox-hacked-database_GM431946152.pdfIn PDF document text
    • https://www.fishboat.hr/files/free-roblox-adopt-me-accounts_GM431946152.pdfIn PDF document text
    • https://www.fishboat.hr/files/free-game-packs-for-coin-master_GM406889139.pdfIn PDF document text
    • http://fishboat.hr/files/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.fishboat.hr/files/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://fishboat.hr/files/how-to-get-free-gamepasses-on-roblox_GM431946152.pdfIn PDF document text
    • http://fishboat.hr/files/coin-master-rewards-app_GM406889139.pdfIn PDF document text
    • https://www.fishboat.hr/files/roblox-jailbreak-how-to-get-a-free-bugatti_GM431946152.pdfIn PDF document text
    • https://www.fishboat.hr/files/minecraft-switch-free_GM479516143.pdfIn PDF document text
    • http://fishboat.hr/files/roblox-cash-grab-simulator-hack_GM431946152.pdfIn PDF document text
    • http://fishboat.hr/files/free-apk-mod-coin-master_GM406889139.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_off00002c91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C91 22020 bytes
SHA-256: e90770273b3ef305503b35cc00664478c1178ab7afc5a0bba9f333b30bff9356
font_01_sfnt_off00005ceb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CEB 18880 bytes
SHA-256: b6c4639a0efa27a474f01e4d286fb143e2370880626048fbfb2abea6535030cf

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