Malicious PDF — malware analysis report

Static analysis result for SHA-256 f005b6c772964c46…

MALICIOUS

PDF

19.7 KB Created: 2021-06-03 08:28:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 53905c94351824bcde394e8f0d14eae2 SHA-1: 2f2e6280068167155c12ee440d3ddcfb8f0a5ef2 SHA-256: f005b6c772964c461521488b9f21ad8b35c6efe90b2058dd80b2447e82951e20
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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.online/app/431946152/how-to-get-free-robux-games-game-hack PDF link annotation
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/free-spins-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/latest-free-spin-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/coin-master-hack-spins-and-coins-unlimited-free-download_GM406889139.pdfIn PDF document text
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/minecraft-pe-016-0-apk-download-free_GM479516143.pdfIn PDF document text
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/coin-master-free-spins-links-2021_GM406889139.pdfIn PDF document text
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/free-minecraft-capes_GM479516143.pdfIn PDF document text
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/coin-master-free-spins-2021-hack_GM406889139.pdfIn PDF document text
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/roblox-robux_GM431946152.pdfIn PDF document text
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/mathep_GM431946152.pdfIn PDF document text
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/roblox-free-auf-poki_GM431946152.pdfIn PDF document text
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/tiktok-free-or-paid_GM835599320.pdfIn PDF document text
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/how-to-hack-people-in-roblox_GM431946152.pdfIn PDF document text
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/free-unlimited-coin-master-400-spin-link_GM406889139.pdfIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

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