Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eb73db0d85e9cd2…

MALICIOUS

PDF

41.1 KB Created: 2020-12-18 23:19:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb2bcb5613e001cd215c3258e0a3afe9 SHA-1: 7e149f4df6e4a48495e64bfe21bd31bd855bfc45 SHA-256: 9eb73db0d85e9cd22f13b7cd0b84f0d2efce5fe31199c4df20229dd7600939ee
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by multiple heuristics and a machine learning classifier, specifically flagged as a phishing lure. The PDF_IMAGE_LURE heuristic indicates it presents as an image-only document with a clickable action, a common tactic for phishing. The presence of numerous external PDF links, including the primary URL https://traffnew.ru/strik?utm_term=short+i+words+for+first+grade, suggests it is part of a link farm designed to distribute malicious content or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9297

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 41 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://traffnew.ru/strik?utm_term=short+i+words+for+first+grade
    • https://static.s123-cdn-static.com/uploads/4460690/normal_5fcea6f0e4cec.pdf
    • https://cdn-cms.f-static.net/uploads/4446774/normal_5fbfd13dcbb5b.pdf
    • https://cdn-cms.f-static.net/uploads/4417824/normal_5fa8d68357062.pdf
    • https://cdn-cms.f-static.net/uploads/4373301/normal_5f89b69858ee4.pdf
    • https://duzareledibasa.weebly.com/uploads/1/3/4/8/134890493/4f0c8bb9e3c83.pdf
    • https://static.s123-cdn-static.com/uploads/4369189/normal_5fcd31a1aecf9.pdf
    • https://cdn-cms.f-static.net/uploads/4379614/normal_5fd31256d918b.pdf
    • https://s3.amazonaws.com/xedewofuretujo/55177973397.pdf
    • https://s3.amazonaws.com/dovulavavo/which_of_the_following_is_considered_a_cash_inflow.pdf
    • https://uploads.strikinglycdn.com/files/90d3c188-41f8-4ae0-9e0f-941e6ca8b118/branches_of_life_sciences.pdf
    • https://uploads.strikinglycdn.com/files/4d765568-ff45-4270-8691-0bad0630fe17/warrior_of_light_lenna_ffbe.pdf
    • https://s3.amazonaws.com/fejatepudopito/pepekotolikib.pdf
    • https://s3.amazonaws.com/sukobogixe/bonk.io_unbloked_games_6969.pdf

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