Malicious PDF — malware analysis report

Static analysis result for SHA-256 9485976d0b952bad…

MALICIOUS

PDF

61.3 KB Created: 2021-08-13 08:54:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 6ab1052be937025226f852c308263e4c SHA-1: 0f9948065abb5c048c0359629b377d35ec6e059d SHA-256: 9485976d0b952badee27fdcac473f89f7d1bded0d46dce6e45f723386a72ab60
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document was flagged by ClamAV as a phishing trojan and also triggered a machine learning classifier for malicious PDFs. It contains a link farm pointing to multiple PDF files hosted on compromised WordPress sites and other domains, suggesting an attempt to distribute malicious content or conduct phishing. The presence of embedded URLs and the nature of the detected heuristics indicate a likely spearphishing attachment attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5029

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 http://aftckwt.com/uploads/file/79413400152.pdf In PDF document text
    • http://vankouwenenmastop.nl/UserFiles/file/xiwajiduduw.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3b3fa8bb95---51656304669.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16089a331b17e3---vurabijukutaxazeze.pdfIn PDF document text
    • https://binarbaidfabrication.com/public_html/userfiles/file/28683273031.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/enk76rhugjri5topt0oh87fuv7/53645844673.pdfIn PDF document text
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/a1496466ab69b0457f0d417301e1a81e/wibefezunuvuvebilulije.pdfIn PDF document text
    • http://ahlhy.com/uploadIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=serial+number+for+adobe+acrobat+x+pro+10.0.0PDF link annotation

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