Malicious PDF — malware analysis report

Static analysis result for SHA-256 c864522aac8c8d98…

MALICIOUS

PDF

34.4 KB Created: 2019-10-29 07:56:26 +03:00 Authoring application: calibre 0.9.36 [http://calibre-ebook.com]
MD5: cb4bb37c28a6e8fe8e471e3593425aaf SHA-1: fb31fd019756274e88cb8b6bccf485d67ff643c4 SHA-256: c864522aac8c8d98e493cb637b221f0d20be807bb71e50fa84eda10fb1c68590
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 additional 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 0.8531

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/atavus-alfonzo-volume-15.pdf
    • http://www.gorillawalker.com/bad-apple-2-burning-daylight-kindle-edition.pdf
    • http://www.gorillawalker.com/castles-and-fortresses.pdf
    • http://www.gorillawalker.com/hotwire-comics-vol-2-v-2.pdf
    • http://www.gorillawalker.com/kevin-jones-snowboarding-champion-extreme-sports-biographies.pdf
    • http://www.gorillawalker.com/california-in-the-new-millennium-the-changing-social-and-political.pdf
    • http://www.gorillawalker.com/unpacking-the-parables-the-wisdom-teachings-of-jesus-kindle-edition.pdf
    • http://www.gorillawalker.com/hooray-for-earth-day-a-rhyming-picture-book-for-children.pdf
    • http://www.gorillawalker.com/radio-mastery-for-vfr-pilots-everything-you-need-to-know.pdf
    • http://www.gorillawalker.com/poland-betrayed-the-nazi-soviet-invasions-of-1939-campaign-chronicles.pdf
    • http://www.gorillawalker.com/five-modern-no-plays.pdf
    • http://www.gorillawalker.com/revised-core-rulebook-star-wars-roleplaying-game.pdf
    • http://www.gorillawalker.com/education-law-policy-review-volume-1-paperback.pdf
    • http://www.gorillawalker.com/the-northern-zone-lake-chad-basin-environmental-health-assessment.pdf
    • http://www.gorillawalker.com/privremene-karte-rasprostranjenosti-dnevnih-leptira-jugoslavije-lepidoptera-rhopalocera-provisional-distribution.pdf
    • http://www.gorillawalker.com/a-primer-in-formal-logic.pdf
    • http://www.gorillawalker.com/seal-team-bravo-black-ops-ii.pdf
    • http://www.gorillawalker.com/ruin-dirty-secrets-book-3-kindle-edition.pdf
    • http://www.gorillawalker.com/3-dimensional-lateral-logic-mazes.pdf
    • http://www.gorillawalker.com/best-ever-meals-on-a-budget.pdf
    • http://www.gorillawalker.com/the-cookbook-of-the-jews-of-greece.pdf
    • http://www.gorillawalker.com/biomedical-particle-accelerators.pdf
    • http://www.gorillawalker.com/holt-mcdougal-integrated-math-1-california-student-edition-interactive-worktext.pdf
    • http://www.gorillawalker.com/lo-que-cuentan-los-onas.pdf
    • http://www.gorillawalker.com/the-cambridge-history-of-british-theatre-3-volume-paperback-set.pdf
    • http://www.gorillawalker.com/the-cool-impossible-the-coach-from-born-to-run-shows.pdf
    • http://www.gorillawalker.com/gluten-free-cookbook-for-people-on-a-gluten-free-diet.pdf
    • http://www.gorillawalker.com/jamaica-an-its-people.pdf
    • http://www.gorillawalker.com/thompson-chain-reference-bible-kjv-version-illustrated-thompson-s-original.pdf
    • http://www.gorillawalker.com/step-rivalry-a-taboo-erotica-competing-for-the-man-of.pdf
    • http://www.gorillawalker.com/from-cape-cod-to-the-bay-of-fundy-an-environmental.pdf
    • http://www.gorillawalker.com/the-2009-2014-world-outlook-for-aluminum-sheet-metal-work.pdf
    • http://www.gorillawalker.com/step-by-step-watercolor-painting-a-complete-guide-to-mastering.pdf
    • http://www.gorillawalker.com/a-step-in-time-a-kid-s-guide-to-ephesus.pdf
    • http://www.gorillawalker.com/literature-of-the-nonprofit-sector-a-bibliography-with-abstracts.pdf
    • http://www.gorillawalker.com/rheology-modifiers-handbook-practical-use-and-applilcation.pdf
    • http://www.gorillawalker.com/the-physics-of-phase-transitions-concepts-and-applications-advanced-texts.pdf
    • http://www.gorillawalker.com/god-s-wisdom-for-your-life-1-000-key-scriptures.pdf
    • http://www.gorillawalker.com/50-walks-in-gloucestershire-50-walks-of-3-to-8.pdf
    • http://www.gorillawalker.com/conducting-the-lawful-employment-interview-how-to-avoid-charges-of.pdf
    • http://www.gorillawalker.com/privremene-karte-rasprostranjenosti-dnevnih-leptira-jugoslavi
    • 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://calibre-ebook.com
    • 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#
    +1 more URL(s)

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