Malicious PDF — malware analysis report

Static analysis result for SHA-256 f112b0bce7918335…

MALICIOUS

PDF

99.8 KB Created: 2021-09-07 22:59:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 4b9ab8dc4a1ebd0c2d643f9dd612b768 SHA-1: b540179d51ea7868d7c667f53f500ad471d3da93 SHA-256: f112b0bce7918335359a8b5f64782ae01442a17a8f3d7fbf874252c125ac4be5
124 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5853

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://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/a25l6j9nrb1ritj0d23gdvde15/55316753647.pdf In PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160cb19e741346---luwunakijap.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/fdccd14a22065e7add25cf5ec8835119/45232698237.pdfIn PDF document text
    • http://thuocamakong.net/userfiles/image/file/labusuw.pdfIn PDF document text
    • http://sicilyontable.it/userfiles/files/11346210490.pdfIn PDF document text
    • http://comlark.ru/userfiles/files/47512735545.pdfIn PDF document text
    • http://tekizolasyon.com/ckfinder/userfiles/files/27968017102.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=u+bahn+berlin+pdf+downloadPDF link annotation

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