Malicious PDF — malware analysis report

Static analysis result for SHA-256 1963b1bc0352028c…

MALICIOUS

PDF

53.9 KB Created: 2021-08-13 23:08:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 4328cd2fbc12a73b68576033ed4abd50 SHA-1: 1ac4a9f2651cf090ddcd96a7859c8fcf33d758e6 SHA-256: 1963b1bc0352028c048684f38dfc8b551354c9eb1933e5cfb97212cfdac8b89b
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2884

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://medvor.ru/uplcv?utm_term=magnitudes+fisicas+y+analisis+dimensional+ejercicios+resueltos PDF link annotation
    • http://aven.su/userfiles/file/bedosamujikiwon.pdfIn PDF document text
    • https://mujeresenmovimientoplus.com/userfiles/file/943440203.pdfIn PDF document text
    • https://thefertilizerequipment.com/d/files/wugate.pdfIn PDF document text
    • http://55pluscommunityspecialist.com/userfiles/files/tovaxakijesuwabofonesesa.pdfIn PDF document text
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/kukoze.pdfIn PDF document text
    • https://angkortaxiservice.com/userfiles/file/gaxukizulasepadojutonuwuj.pdfIn PDF document text
    • http://bjjiffy.com/upload/nedojovexodenogalozumani.pdfIn PDF document text
    • http://gomientrung.vn/uploads/image/files/vugegog.pdfIn PDF document text

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