Malicious PDF — malware analysis report

Static analysis result for SHA-256 a11affdb62b29167…

MALICIOUS

PDF

45.0 KB Created: 2021-09-06 01:48:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 127ce4e795e82f1a1712cd0d621b51b2 SHA-1: 0a75fc0e2a2856b891ce6d988d599e78d7d49dee SHA-256: a11affdb62b291670cf971703c32dda78dbb6a212c65bd7a5a3e1d91164e2843
94 Risk Score

Malware Insights

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

The file was detected as a phishing trojan by ClamAV. Several heuristics indicate the presence of links pointing to compromised WordPress sites, specifically within form upload directories. These links are likely intended to host or redirect to malicious content, serving as a lure for users.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3595

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/k4i8haqkvgj743un8d2mnsidgp/893977748.pdf In PDF document text
    • http://dmscsmartlifeblog.com/userfiles/files/82469680497.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608e638eb1c5f---9462315649.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b9a48573e35---bupavefijixix.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=curriculum+development+syllabus+pdfPDF link annotation

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