Malicious PDF — malware analysis report

Static analysis result for SHA-256 3487adbde6fc58bc…

MALICIOUS

PDF

127.6 KB Created: 2021-09-07 23:03:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: cdf5fae330fd595fbbca25262c635bb9 SHA-1: e9411f4bcf4de9aff1814404047ef574590343ed SHA-256: 3487adbde6fc58bc08e967b2a074637d36fa645759c11a4489781ae5671c812d
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as a phishing trojan by ClamAV. It contains multiple links, several of which point to compromised WordPress sites hosting PDF files. These links are likely used to distribute malware or lead users to phishing pages. No scripts were extracted from this sample, but the presence of external links and the ClamAV detection strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3428

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 http://tdfinalists.ca/clients/43449/File/6563823947.pdf In PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/nqead0pi5ke3uk04fbb9808a22/70478751418.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/cb73e3ffbca7507d67ed7bb3d243724a/89936467462.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c126b33b874---kuxewiberitekezijivux.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/filesIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=fanny+hill+pdf+ebookPDF link annotation

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