Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ca4740f194491e6…

MALICIOUS

PDF

41.4 KB Created: 2018-11-23 08:08:36 +03:00 Authoring application: - (via Acrobat Distiller 3.0 for Power Macintosh)
MD5: 1aa8ffe880c86427e5451107a1102447 SHA-1: 12ebe6a07751a16cfe7cfc0d1fd47db44d528823 SHA-256: 6ca4740f194491e61d57e1d62bc8ff05229ea16a27fcb9dfc38e29527c790193
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, forming a link farm. The heuristic 'PDF_SEO_LINK_FARM' indicates that these links are likely generated for SEO purposes, potentially to mask malicious activity or to drive traffic. The ML classifier also flagged the PDF as malicious. No scripts were extracted from this sample.

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/zachary-dixon-officer-apprentice-alien-artifact-stories.pdf
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    • 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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