Malicious PDF — malware analysis report

Static analysis result for SHA-256 204615b2ef37511a…

MALICIOUS

PDF

77.1 KB Created: 2021-10-14 00:34:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: ce2af956bbf3a9ca87afda26c66d3ac3 SHA-1: 49ab64e48bf11388bb2047e1d75581507b6a2024 SHA-256: 204615b2ef37511ae7123e666b61571086009c82ef57283fbf8e58036445744f
124 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm with numerous embedded URLs pointing to other PDF files on various domains. The presence of multiple unknown URLs suggests a distribution mechanism for further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8240

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://supportsystemsvainc.com/home/ssvi/public_html/ckfinder/userfiles/files/16178970410.pdf In PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1615adaf533377---weloluzamuge.pdfIn PDF document text
    • http://huiking.cn/uploads/file/131347371273.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/7vu86m7t2tj34djd1r23g0hjs6/dufowemikeg.pdfIn PDF document text
    • http://piotrkowska77.pl/zdjeciafile/gimexun.pdfIn PDF document text
    • http://ranchobg.com/img/file/worudajobonomexexirogen.pdfIn PDF document text
    • http://world-housing.jp/ckfinder/userfiles/files/bovovu.pdfIn PDF document text
    • http://menifee.hanasushichoice.com/uploads/files/sokes.pdfIn PDF document text
    • https://cemb.ca/upIn PDF document text
    • http://feedproxy.google.com/~r/Xvkpad/~3/896FEnmJZlk/uplcv?utm_term=before+you+accuse+me+tab+pdfPDF link annotation

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