Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9fc8e9876145a64…

MALICIOUS

PDF

42.0 KB Created: 2021-04-24 19:56:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 0f4cf125fa9c13086d5baecc1ce59013 SHA-1: 8ddf167f8f697464285c723ee366e441a547889e SHA-256: c9fc8e9876145a6482ab80ea6aaf43515e5b4c63ca288d73b88df2729255f4f3
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 0.9941

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/431946152/roblox-weight-lifting-simulator-3-infinite-strength-hack-script-game-hack PDF link annotation
    • http://charivne.info/ckfinder/userfiles/files/free-robux-hack-generator-no-human-verification-2021.pdfIn PDF document text
    • http://charivne.info/ckfinder/userfiles/files/how-to-cheat-in-roblox-treasure-hunt.pdfIn PDF document text
    • http://charivne.info/ckfinder/userfiles/files/how-to-hack-teleport-a-player-in-roblox.pdfIn PDF document text
    • http://charivne.info/ckfinder/userfiles/files/roblox-tycoon-hack-2021.pdfIn PDF document text
    • http://charivne.info/ckfinder/userfiles/files/tradelands-roblox-cheats.pdfIn PDF document text
    • http://charivne.info/ckfinder/userfiles/files/roblox-change-face-hack.pdfIn PDF document text
    • http://charivne.info/ckfinder/userfiles/files/this-obby-gives-you-free-robux.pdfIn PDF document text
    • http://charivne.info/ckfinder/userfiles/files/roblox-mobile-hacks-for-free.pdfIn PDF document text
    • http://charivne.info/ckfinder/userfiles/files/roblox-jailbreak-hack-money-francais.pdfIn PDF document text
    • http://charivne.info/ckfinder/userfiles/files/free-money-codes-on-adopt-me-roblox.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_003_off00004171.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4171 26936 bytes
SHA-256: 63ed8f8926182825ea57a0ec7c9e7188fdfe3a379de06470ca3f4f936327cdad
font_01_sfnt_off00007df5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DF5 19808 bytes
SHA-256: 579fbd3a3a1c0e8c7588ed31f2036a7f8f3160702fad52a3dfa903287a5e75ad

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