Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac7dca8ec05d911d…

MALICIOUS

PDF

42.2 KB Created: 2019-03-17 04:20:52 +03:00 Authoring application: Acrobat PDFMaker 6.0 for Word (via Acrobat Distiller 6.0 (Windows))
MD5: 7c3f859244f019186c291993338302c9 SHA-1: 79705e3d0ae09867a3cbfef00825482a4464d982 SHA-256: ac7dca8ec05d911dcb9f0bd009b315cdd772199d4c477599ff6e10a755cbbae3
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment

The PDF contains a large number of embedded links to external PDF files, indicating a link farm strategy. This is likely intended to drive traffic to these external resources, potentially for SEO manipulation or to host malicious content. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9181

Heuristics 2

  • 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.
  • 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://www.gorillawalker.com/network-student-book-workbook-multipack-2b.pdf
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    • http://www.gorillawalker.com/motivation-for-teens.pdf
    • http://www.gorillawalker.com/technical-drawing-11th-edition-instructor-s-manual-with-cd-rom.pdf
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    • http://www.gorillawalker.com/hanoi-s-war-an-international-history-of-the-war-for.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://www.aiim.org/pdfa/ns/extension/
    • http://www.aiim.org/pdfa/ns/schema#
    • http://www.aiim.org/pdfa/ns/property#
    • http://www.aiim.org/pdfa/ns/id/

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