Malicious PDF — malware analysis report

Static analysis result for SHA-256 114a66c3f2c6e0a6…

MALICIOUS

PDF

43.5 KB Created: 2018-12-11 20:05:37 +03:00 Authoring application: FrameMaker 5.5.6. (via Acrobat Distiller 4.05 for Sparc Solaris)
MD5: acba1f450d7b3b17104b91dc9992a80a SHA-1: eed73c729a17be66e60d069ccb52c9345f87ce34 SHA-256: 114a66c3f2c6e0a64eca7ca7f9adc7285af2557a31703287725ff4263d125eba
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs pointing to external PDF files, as indicated by the PDF_SEO_LINK_FARM heuristic. This suggests the document is designed to manipulate search engine results or redirect users to potentially malicious content hosted on the gorillawalker.com domain. 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 0.9171

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.
    URL http://www.gorillawalker.com/los-imanes-que-salvaron-mi-vida-una-guia-holistica-para.pdf
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    • http://www.gorillawalker.com/dreamland-a-riley-bloom-book.pdf
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    • http://www.gorillawalker.com/atlas-of-inner-mongolia-autonomous-region-of-dual-use-transportation.pdf
    • http://www.gorillawalker.com/the-collected-poems-of-sara-teasdale-sonnets-to-duse-and.pdf
    • http://www.gorillawalker.com/students-who-drive-you-crazy-succeeding-resistant-unmotivated-and-otherwise.pdf
    • http://www.gorillawalker.com/moleskine-2016-weekly-notebook-12m-large-mauve-purple-hard-cover.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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