Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bd036e2e45cad3d…

MALICIOUS

PDF

52.6 KB Created: 2021-10-10 11:07:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: f3a8eab2c0645f5986cf8ca8ecd9a866 SHA-1: 7ae661a29140e0d70ec74a568b7f77a4c0d20a7d SHA-256: 7bd036e2e45cad3d40747e8fea5c44bc30736491e569598afb7ee113fa97e540
124 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to disposable domains, indicating a link farm designed to redirect users to potentially malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags this behavior, suggesting a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7185

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://drafthe.ru/uplcv?utm_term=tactile+learning+style+examples PDF link annotation
    • https://www.vignolaweb.it/ckfinder/userfiles/files/83270937613.pdfIn PDF document text
    • https://tekdalyapi.com/upload/ckfinder/files/85188782624.pdfIn PDF document text
    • http://yugang360.com/upload_fck/file/2021-10-9/20211009135340257108.pdfIn PDF document text
    • http://pomodorolennep.de/gfx/userfiles/files/gofijixurat.pdfIn PDF document text
    • http://doktor-okonski.pl/uploadimg/file/29083329186.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/selafoxe.pdfIn PDF document text
    • https://genegurumiraclehealer.com/userfiles/file/38855317176.pdfIn PDF document text
    • https://dentalrud.com/userfiles/file/kabafufajadevomewedukem.pdfIn PDF document text
    • http://cgl.lu/userfiles/files/78387341840.pdfIn PDF document text
    • http://themadthinker.com/temp/vinney/HTML/userfiles/file/66338539276.pdfIn PDF document text
    • http://worldofpacifiers.com/editor_uploads/system/files/nawomuri.pdfIn PDF document text

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