Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a81933edfd612a1…

MALICIOUS

PDF

63.0 KB Created: 2020-12-28 20:48:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 86994a00818ac0c883e39bd46bbc95ac SHA-1: 06f6bfcaa968a0e3e16e4eb2cc7feecb2c570d5c SHA-256: 4a81933edfd612a16c19e10b5178c86dd1b5338bd29010fe2d2ca59d6099dcf3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a significant number of external links, identified as a link farm, suggesting a phishing or SEO manipulation tactic. The ClamAV detection and ML classifier further indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9485

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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafficel.ru/strik?utm_term=who+gave+eren+kruger+the+attack+titan
    • https://dobopekajami.weebly.com/uploads/1/3/4/3/134314215/numogeparije_kifamugiman.pdf
    • https://puliwive.weebly.com/uploads/1/3/4/6/134660228/e25555b2d3af.pdf
    • https://fejamelaluboj.weebly.com/uploads/1/3/4/3/134311679/nerotuxokuf.pdf
    • https://tuboxivodase.weebly.com/uploads/1/3/4/3/134387713/ab54c0778cb.pdf
    • https://munazuzane.weebly.com/uploads/1/3/4/3/134350045/0ba3b7b1.pdf
    • https://cdn-cms.f-static.net/uploads/4410448/normal_5fa5f9569004f.pdf
    • https://cdn-cms.f-static.net/uploads/4388426/normal_5f8fa268c597d.pdf
    • https://uploads.strikinglycdn.com/files/efb4fc04-d398-4e16-8fe5-34b8e23fbfca/hungry_shark_evolution_mod_apk_newest_version.pdf
    • https://s3.amazonaws.com/jobavo/jejijiwixotemakatunusar.pdf
    • https://s3.amazonaws.com/xoferuzu/nasuwokafaso.pdf
    • https://uploads.strikinglycdn.com/files/77ade6f6-0a1f-4549-9da6-7c095eb429e8/knight_rider_voice_box.pdf
    • https://s3.amazonaws.com/tobojelusiwi/4572734772.pdf
    • https://uploads.strikinglycdn.com/files/1e2ad798-5c02-4def-8618-3e6d38183db5/59429683491.pdf
    • https://uploads.strikinglycdn.com/files/993e8c46-82af-4ea3-8522-762746b26307/biomes_o_plenty_mod_pe.pdf

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