Malicious PDF — malware analysis report

Static analysis result for SHA-256 676d59ca266f07c6…

MALICIOUS

PDF

43.4 KB Created: 2018-11-26 20:12:13 +03:00 Authoring application: Adobe InDesign CC (Macintosh) (via Adobe PDF Library 10.0.1)
MD5: 7701627239247f2b5ee515cbb3004cd4 SHA-1: 949a565c816288a03a2aa6882d408346b3801907 SHA-256: 676d59ca266f07c6d3db1e60d03b7a4ad9ef544b8aa91ed8d823b869b57e5d63
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links to external PDF files, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged the document as malicious. The primary purpose appears to be SEO manipulation or distributing links to potentially malicious content hosted on gorillawalker.com.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9171

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.
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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/