Malicious PDF — malware analysis report

Static analysis result for SHA-256 8233df7cca2a5106…

MALICIOUS

PDF

41.2 KB Created: 2021-05-11 09:22:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 3b5ae1ab1fb246a1b8e1e1b73909e409 SHA-1: 4fdcb03c65196b61631141754564af0df7ac523c SHA-256: 8233df7cca2a51069c01a65ed2e81ed18733369cdd41d41bd6ef0792f9122bea
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/479516143/minecraft-hack-app-game-hack PDF link annotation
    • http://cofys.nl/images/coinmaster-spins_GM406889139.pdfIn PDF document text
    • http://cofys.nl/images/how-to-get-free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://cofys.nl/images/get-free-cards-coin-master_GM406889139.pdfIn PDF document text
    • http://cofys.nl/images/minecraft-free-download-ipad_GM479516143.pdfIn PDF document text
    • http://cofys.nl/images/minecraft-free-online-games_GM479516143.pdfIn PDF document text
    • http://cofys.nl/images/free-robux-com-real_GM431946152.pdfIn PDF document text
    • http://cofys.nl/images/rbx-free_GM431946152.pdfIn PDF document text
    • http://cofys.nl/images/free-minecraft-coins_GM479516143.pdfIn PDF document text
    • http://cofys.nl/images/coin-master-free-spins-link-2021-iphone_GM406889139.pdfIn PDF document text
    • http://cofys.nl/images/free-roebucks_GM431946152.pdfIn PDF document text
    • http://cofys.nl/images/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://cofys.nl/images/free-robux-real_GM431946152.pdfIn PDF document text
    • http://cofys.nl/images/free-robux-mod_GM431946152.pdfIn PDF document text
    • http://cofys.nl/images/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://cofys.nl/images/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://cofys.nl/images/mobihack-roblox-hack_GM431946152.pdfIn PDF document text
    • http://cofys.nl/images/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://cofys.nl/images/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • http://cofys.nl/images/free-minecraft-com_GM479516143.pdfIn PDF document text
    • http://cofys.nl/images/coin-master-hack-app-2021_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_off0000481e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x481E 24924 bytes
SHA-256: df09cbb56f27f19899ea64a2a58f71456599bb713ec188f23ae31605010f312d
font_01_sfnt_off00007ffa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FFA 17912 bytes
SHA-256: 034e04b5cafc108ff4258a9a8c33ed7a0e20a1bf60bea28de924bbbe05b546ea

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