Malicious PDF — malware analysis report

Static analysis result for SHA-256 c98752ee76bfd7f8…

MALICIOUS

PDF

49.6 KB Created: 2020-12-03 16:29:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0677b9e1dbc0d3c8d0f017991f33687e SHA-1: f3f9d339938ce25de06bd1fc12e2437b6d1094da SHA-256: c98752ee76bfd7f8dbfdac7c5a94e1ec226ba13117657918a5c2dd237e25a172
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF employs a common screenshot lure, presenting itself as a document but containing a clickable element that redirects to an external URL. This URL, along with numerous others found within the PDF, likely serves to host malicious content or engage in SEO manipulation. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7009

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 49 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://trafffi.ru/aws?utm_term=guided+reading+activity+ideas+year+5
    • https://moxetutatag.weebly.com/uploads/1/3/4/2/134234950/pariku.pdf
    • https://gomemetunugup.weebly.com/uploads/1/3/2/7/132712315/sotorirazajedi-turajotatufa-rosuw.pdf
    • https://cdn-cms.f-static.net/uploads/4454670/normal_5faa527d800b1.pdf
    • https://bitifuzafaf.weebly.com/uploads/1/3/4/4/134488734/16c52e0c0a.pdf
    • https://lebabipiw.weebly.com/uploads/1/3/0/9/130968925/2a4f1e9a80.pdf
    • https://cdn-cms.f-static.net/uploads/4383327/normal_5f8d8e0d5d538.pdf
    • https://gorasugaki.weebly.com/uploads/1/3/4/7/134766712/jebuzasogax_dagusafujunumos_nokujibivesev.pdf
    • https://dunujamovexen.weebly.com/uploads/1/3/4/3/134361976/f6f17f0d0892.pdf
    • https://polabufasol.weebly.com/uploads/1/3/2/8/132814050/nimifomun.pdf
    • https://gozivuwedigati.weebly.com/uploads/1/3/4/6/134612943/1581207.pdf
    • https://uploads.strikinglycdn.com/files/764f3c1e-4dd7-413d-b11f-ae51f16b61bb/32265212282.pdf
    • https://uploads.strikinglycdn.com/files/818fac6b-5ff6-4a43-91dc-9d5b7ff65d7e/rugalukibalowajod.pdf
    • https://uploads.strikinglycdn.com/files/099fc8ac-27b7-474a-8c40-df09fb6ce231/game_of_sultans_coalition_guide.pdf
    • https://uploads.strikinglycdn.com/files/a33aa4ce-5f52-4eb4-a696-93ea9db98f5c/sample_3rd_grade_student_council_speeches.pdf

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