Malicious PDF — malware analysis report

Static analysis result for SHA-256 b08ccbbde1665c81…

MALICIOUS

PDF

43.7 KB Created: 2018-11-30 21:01:03 +03:00 Authoring application: Adobe Acrobat Pro 11.0.18 (via Adobe PDF Library 11.0)
MD5: c4a2487d37d62ef27cab0c7fd286f21e SHA-1: ecd2dad4362160257b28cd6991615acbbb3ad7af SHA-256: b08ccbbde1665c818209382357f281ac00fcc3fcd1f3b3909945022e1f75d8c5
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, a technique often used for SEO manipulation or to distribute further malicious content. The ML classifier also flagged this document as malicious. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9016

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/