Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c3f26e292fb3229…

MALICIOUS

PDF

68.5 KB Created: 2021-08-21 13:36:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0c41e4b0a947f55b5a9375c9eac3c6a0 SHA-1: a539dfc5c047933c83891d0724e95a0e1843b664 SHA-256: 5c3f26e292fb322958061b7c1698a2467e53f8f494a7f6159f82bbd609b11ee2
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected by ClamAV as a phishing trojan and flagged by an ML classifier. It contains multiple external URIs and links to compromised WordPress upload storage, indicating an attempt to redirect users to malicious sites. The presence of embedded URLs and the PDF structure suggest it's designed to exploit users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5614

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. 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://crewmak.ru/uplcv?utm_term=elite+dangerous+mining+guide+2018 PDF link annotation
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/scsstnjg4hm5o7jejoc8skduln/64108263702.pdfIn PDF document text
    • https://panama4d.com/contents/files/dibibi.pdfIn PDF document text
    • http://medicamarsala.it/userfiles/files/35567932505.pdfIn PDF document text
    • http://resortcrimea.com/ckfinder/userfiles/files/62045711947.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160757a5aaff34---kafopoki.pdfIn PDF document text
    • http://4998horo.gmmwireless.com/contents/files/nipegusuwipirolimo.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609cc0c7228fc---pikewenoxozojadu.pdfIn PDF document text

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