Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9350a1424a78929…

MALICIOUS

PDF

47.5 KB Created: 2020-12-23 00:01:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5452e5c5dea1a2a095cebb03c836500b SHA-1: fa8052ab8fc18dbde16844af916331755a6f84e9 SHA-256: b9350a1424a78929c3e1b8bfce018a0028ae85d105f0cf8b01a851312bbd371f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating it is likely a phishing or trojan delivery mechanism. It contains numerous external links, with one pointing to 'trafffe.ru/strik', suggesting an attempt to redirect users to a malicious site. The PDF structure and heuristic firings indicate a link farm or SEO poisoning attempt, common in phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8346

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://trafffe.ru/strik?utm_term=birdies+nolensville+tn
    • https://cdn-cms.f-static.net/uploads/4468274/normal_5fa68289d60bd.pdf
    • https://static.s123-cdn-static.com/uploads/4453333/normal_5fe21fcd0bd81.pdf
    • https://cdn-cms.f-static.net/uploads/4466679/normal_5fb83124b2c41.pdf
    • https://rikisuluwujufa.weebly.com/uploads/1/3/1/4/131452938/bb13787.pdf
    • https://raxagipob.weebly.com/uploads/1/3/4/8/134883443/movuxazapiga.pdf
    • https://fawubanine.weebly.com/uploads/1/3/4/3/134321827/3231526.pdf
    • https://tugojomabam.weebly.com/uploads/1/3/4/5/134588125/9255929.pdf
    • https://cdn-cms.f-static.net/uploads/4368750/normal_5f96a39eb8dde.pdf
    • https://s3.amazonaws.com/robumuduluwise/apa_pacific_division_2020.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd0f2eef3361272aee8100/1606225710485/kaboniwolinowule.pdf
    • https://s3.amazonaws.com/betefowubevat/vulorabipoko.pdf
    • https://s3.amazonaws.com/ginutu/jaxaniwobafitavu.pdf
    • https://s3.amazonaws.com/rovuweraja/70991630438.pdf
    • https://s3.amazonaws.com/lovomijelun/ludotesugosanuroluwenujel.pdf
    • https://s3.amazonaws.com/fotepopunaj/92577546652.pdf
    • https://s3.amazonaws.com/jenisozazewubo/best_action_movies_2016.pdf

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