Malicious PDF — malware analysis report

Static analysis result for SHA-256 47fb62a4529c506e…

MALICIOUS

PDF

34.0 KB Created: 2019-05-24 00:42:40 +03:00 Authoring application: Adobe Acrobat 8.0 (via Adobe Acrobat 8.0 Image Conversion Plug-in)
MD5: 9f50526fd9c800868505f84a7cf6c401 SHA-1: f92898b40b1b49befbf52096128a955fa58b353b SHA-256: 47fb62a4529c506ea1596a0bcfac115d9542830805469e1ea2bd5fd52ebabed7
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment

The PDF file contains a large number of embedded links to external PDF documents, a technique often used for SEO manipulation or to distribute malicious content. The ML classifier also flagged this PDF as malicious. No scripts were extracted from this sample. The primary attack pattern observed is the mass linking to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8529

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/otkotachinokindansai-japanese-edition-kindle-edition.pdf
    • http://www.gorillawalker.com/fierce-medicine-breakthrough-practices-to-heal-the-body-and-ignite.pdf
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    • http://www.gorillawalker.com/die-konnatale-zytomegalievirusinfektion-epidemiologie-diagnose-therapie-german-edition.pdf
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    • http://www.gorillawalker.com/seaforth-world-naval-review-2013.pdf
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    • http://www.gorillawalker.com/a-minecraft-mini-encyclopedia-kindle-edition.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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