Malicious PDF — malware analysis report

Static analysis result for SHA-256 824e3ab4e2c23221…

MALICIOUS

PDF

30.0 KB Created: 2020-04-13 04:17:38 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 2c70f85c3344f88b9572bc648b9ae0e1 SHA-1: 48945df9454a414834b89aab1e196ae45bf86450 SHA-256: 824e3ab4e2c23221f60e7bf5a0a8d20e5767c1bc3932c5e43c6d92e68e1c5d1e
94 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to other PDF files hosted on various domains. This behavior is indicative of a link farm or SEO manipulation tactic, potentially used to distribute malicious content or to obscure the true nature of the document. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8918

Heuristics 3

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://lets-make-this.com/uploads/1/3/0/9/130969200/130969200.html#mackie+onyx+1640+power+supply+schematic
    • http://foggmechanical.com/uploads/1/3/1/6/131606193/5c2b0df4d6c3c9a.pdf
    • http://omeraziz.com/uploads/1/3/0/5/130538842/fizikebop.pdf
    • http://kerkstraatharen.nl/uploads/1/3/1/4/131453943/motibox_miges.pdf
    • http://pastorlee.org/uploads/1/3/0/3/130313299/2954249.pdf
    • http://northbaby.net/uploads/1/3/0/5/130589381/6a47a6.pdf
    • http://intrapreneurassociation.com/uploads/1/3/0/4/130435695/5433021.pdf
    • http://alltypedriveways.com/uploads/1/3/0/6/130620934/f92aad0.pdf

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