Malicious PDF — malware analysis report

Static analysis result for SHA-256 489267509fc04201…

MALICIOUS

PDF

40.8 KB Created: 2021-04-30 07:01:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 826931b3a3e0ee9dd748e8005ede0cfa SHA-1: 1688f39d1de1f3ed6cd46876e04d8ece41f83af3 SHA-256: 489267509fc042017c8eb6b8ee74b6a4cd0bbbde7e411d9059c0d7b3ad578e2b
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/free-item-roblox-hack-game-hack PDF link annotation
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/hack-roblox-account-kali-linux.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/how-to-get-free-robux-without-hacking-2021.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/how-to-get-free-stuff-on-roblox-mobile.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/ultimate-random-night-how-to-hack-roblox.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/roblox-points-hack.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/hack-para-tener-robux-2021.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/best-free-items-in-roblox.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/how-to-hack-apocalypse-rising-on-roblox.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/roblox-ccv3-speed-hack.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/hack-to-survive-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_off0000413e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x413E 25508 bytes
SHA-256: e407aa355988c374ff133844226d67188be8cd1ee0cffe56dd59dc018f75e664
font_01_sfnt_off00007cad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CAD 18708 bytes
SHA-256: a9005d4ee36f0e0aa215f7efe49f3615c72e2a4ab3bfdcf69816b37d7bc2dac4

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