Malicious PDF — malware analysis report

Static analysis result for SHA-256 22198d5cec938327…

MALICIOUS

PDF

48.0 KB Created: 2021-09-15 01:43:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 75ba29eef6e82d558a10b55d076d30b6 SHA-1: db8b8ef46740a19a6ef4403dc415ea65087fd5f8 SHA-256: 22198d5cec938327abd75300fc15bc07a7a8c54f40e60eb5f07199f9bfcbaa65
124 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated maliciousness. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the PDF is designed to host multiple links on disposable domains, likely to obscure the final destination. The embedded URLs point to various PDF files hosted on different domains, indicating a potential redirection chain or a link farm used for phishing or malware distribution.

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://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/befd086b2c3bfc7cf78a7dd2721439ea/77097519349.pdf In PDF document text
    • http://gzsjlt.cn/userfiles/file/19825001939.pdfIn PDF document text
    • http://salman-group.com/userfiles/file/gexuladizixabavoxo.pdfIn PDF document text
    • https://armenia4d.com/contents/files/56961242085.pdfIn PDF document text
    • http://nutrizionisti.eu/public/thread/risorse/file/gorubugasemefazoduwefataf.pdfIn PDF document text
    • https://istanajp.com/contents/files/4415134679.pdfIn PDF document text
    • https://linhquan-group.com/upload/ck/files/73963702025.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16135a57248dc4---zupafadizexalozo.pdfIn PDF document text
    • http://thietbiantoanttk.com/uploads/files/fodijevef.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/filIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=white+icon+packPDF link annotation

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