Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4ce5e0d90746a10…

MALICIOUS

PDF

47.6 KB Created: 2021-09-01 11:49:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: d12286f83fe44345862c6da130f552e0 SHA-1: 3a0f928ec03fb4c1775b229ea95a812fb63dad72 SHA-256: e4ce5e0d90746a109ada9f2ffb7e09a8b36c8ff24a662a356879bee348cdff98
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains multiple links pointing to compromised WordPress sites, with one direct link to a PDF hosted on 'sad-azov.ru'. This suggests the PDF is part of a campaign to distribute further malicious content or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8955

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://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/f322f1159e1b5db1617a7649aff2e3fd/39400402546.pdf In PDF document text
    • https://paklya.su/design/img/upload/file/68843768438.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/ccv8sfh8lij0ommkt5jqkirdji/6197727525.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/c8af6dcc87fb2ea93681d85a17cfe1e2/pabuvagovorixubuw.pdfIn PDF document text
    • https://leise.ru/admin/ckfinder/userfiles/files/32567759798.pdfIn PDF document text
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/67iiitin36rq9623pph3q9smj8/potujoninor.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=japanese+alphabet+and+numbersPDF link annotation

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