Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1e81838140da91b…

MALICIOUS

PDF

49.6 KB Created: 2020-11-14 18:08:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec3d85a0cf62dc64538849351a91878f SHA-1: 7182f4a620115555f62b3ef28b09e9479b4e70a9 SHA-256: b1e81838140da91b280ad679c42ad1362f76ed6d34297eb031e75134a8843c33
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which point to other PDFs, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8263

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://traffking.ru/strik?utm_term=airport+extreme+base+station+setup
    • https://cdn-cms.f-static.net/uploads/4401545/normal_5fa1469000491.pdf
    • https://cdn-cms.f-static.net/uploads/4369760/normal_5fa1b1002512f.pdf
    • https://cdn-cms.f-static.net/uploads/4367004/normal_5f87634d585c4.pdf
    • https://cdn-cms.f-static.net/uploads/4366989/normal_5f8bccf6aec55.pdf
    • https://cdn-cms.f-static.net/uploads/4366004/normal_5f8b085a927bf.pdf
    • https://wozibamerixe.weebly.com/uploads/1/3/4/6/134695723/xubepomufegikex.pdf
    • https://fomikozifu.weebly.com/uploads/1/3/4/5/134511133/920492.pdf
    • https://kubinivoboduwu.weebly.com/uploads/1/3/4/6/134601548/9312126.pdf
    • https://cdn-cms.f-static.net/uploads/4449622/normal_5fa438b092db5.pdf
    • https://xifobosakup.weebly.com/uploads/1/3/2/8/132815359/najebepo.pdf
    • https://cdn-cms.f-static.net/uploads/4384045/normal_5f8cce15f1082.pdf
    • https://ximazula.weebly.com/uploads/1/3/0/7/130738777/760386.pdf
    • https://cdn-cms.f-static.net/uploads/4367005/normal_5f9fd8de3bb20.pdf
    • https://uploads.strikinglycdn.com/files/e10d8f84-25b7-408a-985c-5357dabe15ae/kirigisukipijujiwegefole.pdf

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