Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcbf86e7b3f2b3a9…

MALICIOUS

PDF

49.0 KB Created: 2021-09-09 15:57:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-23
MD5: 267bbdebbfc1485addfe73a6dd1a7a91 SHA-1: 12c33f4d7fe3dfa1bb15dd4791fcd55c5e57d2cb SHA-256: dcbf86e7b3f2b3a9f33f9425275c106e1ff850e3df677908ec90918fde0f3716
124 Risk Score

Malware Insights

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

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7086

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. 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://kermoulin.com/userfiles/file/42053575032.pdf In PDF document text
    • https://picinterior.com/ckfinder/userfiles/files/jenexexaze.pdfIn PDF document text
    • http://creatinglifeoptions.com/userfiles/files/94032901965.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/gukazozobevabadafukulopef.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1612f5cb81a440---rigonakuvixisepa.pdfIn PDF document text
    • http://mabifitness.it/userfiles/files/72265067951.pdfIn PDF document text
    • http://abwingsjanaf.com/uploads/files/96136724850.pdfIn PDF document text
    • http://quanhoangtsi.com/upload/quangtri/files/bakokudimazoga.pdfIn PDF document text
    • http://esipro.lu/userfiles/file/polumupor.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/9592519a2f484099d3bdda68a832d019/ralomoreg.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=words+that+start+with+v+and+end+with+yPDF link annotation

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