Malicious PDF — malware analysis report

Static analysis result for SHA-256 6694f078bc44ac0a…

MALICIOUS

PDF

50.6 KB Created: 2020-12-22 21:23:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 11951b05e77e690d682be32a9b816f4a SHA-1: bbc406274cbef995c9b737b25ff90ca7123b906e SHA-256: 6694f078bc44ac0ab3323c839bbebd4f27bd5f4b33ac14581d4b739bc4eebf46
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF is identified as an image-only lure, a common tactic for phishing or malware delivery. It contains a clickable external URI pointing to 'trafffe.ru', which is likely malicious. The PDF also references a large number of other PDFs, suggesting a link farm or SEO abuse to obscure the malicious intent. ClamAV detection further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6098

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 50 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://trafffe.ru/aws?utm_term=aschenputtel+sketch+pdf
    • https://static.s123-cdn-static.com/uploads/4501231/normal_5fe227e01928a.pdf
    • https://mixorone.weebly.com/uploads/1/3/1/4/131438240/1879083.pdf
    • https://s3.amazonaws.com/gifiz/67307647466.pdf
    • https://s3.amazonaws.com/rupatojuko/23589803327.pdf
    • https://s3.amazonaws.com/mivokozibu/neopets_neopoints_guide.pdf
    • https://s3.amazonaws.com/batoragubukepo/75574129804.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf43468bfc5186166fabe/1606218804988/ticket_stub_diary_amazon.pdf
    • https://s3.amazonaws.com/lanaladu/cafeland_cheats_android_2018.pdf
    • https://s3.amazonaws.com/xanebavifamopez/rolilamarafadusujugupuwax.pdf
    • https://static1.squarespace.com/static/5fdc79c85e71df64d6bd9c29/t/5fdc9a31f31c083990598423/1608292919737/thesis_template_overleaf.pdf

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