Malicious PDF — malware analysis report

Static analysis result for SHA-256 2135707a2fe28ffb…

MALICIOUS

PDF

50.6 KB Created: 2020-11-10 08:00:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 37281ad6b9a8d1bcbaf5ef028dc4b13e SHA-1: a00c32da4bfe44707ef5df05ddd7a4a75576d4be SHA-256: 2135707a2fe28ffb71114c914b5d50df6c97126f4fcf0db2cd87819df28f603c
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ClamAV and ML classifiers, exhibiting characteristics of a phishing lure. The heuristic 'PDF_IMAGE_LURE' indicates it presents as an image-only document with a clickable action, typical for disguising malicious links. The presence of numerous external links, including one to 'traffking.ru', suggests an attempt to redirect users to potentially harmful websites. No scripts were extracted from this sample, but the overall structure points towards a phishing or credential harvesting attempt.

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://traffking.ru/aws?keyword=strike+the+last+word+meaning+in+congress
    • https://cdn-cms.f-static.net/uploads/4372378/normal_5f898eb83700d.pdf
    • https://cdn-cms.f-static.net/uploads/4409244/normal_5f984d31add77.pdf
    • https://rozenawaxu.weebly.com/uploads/1/3/4/5/134517597/mewenu-sibome-pixinofi.pdf
    • https://cdn-cms.f-static.net/uploads/4410416/normal_5f9f6ed69094b.pdf
    • https://uploads.strikinglycdn.com/files/5cc6da83-81c0-4eda-a4e2-6db8bd3f08fe/dota_2_battle_of_mirkwood_battle_royale.pdf
    • https://uploads.strikinglycdn.com/files/ca14f0b2-35cc-4c5f-a122-dca00083878e/vorazalasomibufuzuvabusaf.pdf
    • https://uploads.strikinglycdn.com/files/0dca159c-a372-4d64-9c42-55e565cc4356/fagumobakudesov.pdf
    • https://uploads.strikinglycdn.com/files/ae04537e-967e-4c7b-bbee-736f01dd67e0/badojikisewoxemobit.pdf
    • https://uploads.strikinglycdn.com/files/d3554236-17b7-4bab-9924-82bce84c7b2d/karuguwivowopu.pdf
    • https://uploads.strikinglycdn.com/files/c3b02331-9c30-4632-84a5-17c5c8cda634/glucocil_scam_or_real.pdf

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