Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7eef8acc1de0808…

MALICIOUS

PDF

47.1 KB Created: 2018-12-15 20:00:57 +03:00 Authoring application: GPL Ghostscript 8.64 (via Adobe PDF Library 8.0)
MD5: c96a570b1cdf324ed6b8ec742515225b SHA-1: c9da686b6f91f510ba615571752d5a8b975f5bf5 SHA-256: b7eef8acc1de08082195c522ac714edc45f7c9d03de51cf6e8aa120a8c3e8aa9
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links pointing to external PDF files, 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, and the document body was heavily obfuscated, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8518

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/paris-and-surroundings-berlitz-motoring-map-berlitz-motoring-maps.pdf
    • http://www.gorillawalker.com/introduction-to-modeling-and-analysis-of-stochastic-systems-springer-texts.pdf
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    • http://www.gorillawalker.com/michelin-red-guide-2008-paris-restaurants-hotels-michelin-red-guide.pdf
    • http://www.gorillawalker.com/determination-of-mbts-and-tcmbt-in-municipal-and-industrial-wastewaters.pdf
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    • http://www.gorillawalker.com/multiple-paths-to-literacy-assessment-and-differentiated-instruction-for-diverse.pdf
    • http://www.gorillawalker.com/sustainable-justice-reconciling-economic-social-and-environmental-law.pdf
    • http://www.gorillawalker.com/this-monstrous-thing-hardcover.pdf
    • http://www.gorillawalker.com/bescherelle-bescherelle-poche-orthographe-french-edition.pdf
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    • http://www.gorillawalker.com/little-miss-whoops-and-the-garden-goof-up-the-mr.pdf
    • http://www.gorillawalker.com/master-and-commander-aubrey-maturin-series-book-1.pdf
    • http://www.gorillawalker.com/cancer-is-not-genetic.pdf
    • http://www.gorillawalker.com/betty-crocker-s-cookbook-new-and-revised.pdf
    • http://www.gorillawalker.com/symbols-of-transformation-collected-works-of-c-g-jung-vol.pdf
    • http://www.gorillawalker.com/the-yijing-medical-qigong-system-a-daoist-medical-i-ching.pdf
    • http://www.gorillawalker.com/zen-running.pdf
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    • http://www.gorillawalker.com/adhd-secrets-of-success-coaching-yourself-to-fulfillment-in-the.pdf
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    • http://www.gorillawalker.com/the-retina-and-circadian-rhythms-springer-series-in-vision-research.pdf
    • http://www.gorillawalker.com/pieces-from-the-fitzwilliam-virginal-book-for-c-recorder-and.pdf
    • http://www.gorillawalker.com/coming-to-our-senses-body-and-spirit-in-the-hidden.pdf
    • http://www.gorillawalker.com/basic-midi-music-technology-series.pdf
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    • http://www.gorillawalker.com/determination-of-mbts-and-tcmbt-in-municipal-and-industrial-wastew
    • 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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