Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9f2f44d8d9c5024…

MALICIOUS

PDF

40.1 KB Created: 2019-03-17 03:19:26 +03:00 Authoring application: CorelDRAW X8 (via Corel PDF Engine Version 18.1.0.661)
MD5: fde0682b3ca0834985a686d0bbd21c2b SHA-1: fc7a3f5f6af3ddb24c419b427d79d6f7ba1a1099 SHA-256: c9f2f44d8d9c50240509c09408de14cde7c7e4b91dc7bd22cf59f821527cc5c7
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded URLs pointing to external PDF files on the same domain, as indicated by the PDF_SEO_LINK_FARM heuristic. This suggests a link farm or SEO manipulation tactic. The ML_NYX_PDF_MALICIOUS heuristic also flagged the document with high confidence. No scripts were extracted, and the document body was heavily obfuscated, making it difficult to determine a more specific attack pattern beyond the link farm. The primary IOCs are the numerous URLs found within the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9027

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/keys-to-the-word-piano-solos-with-readings-for-worship.pdf
    • http://www.gorillawalker.com/differential-equations-geometric-theory-phoenix-edition-2nd-edition.pdf
    • http://www.gorillawalker.com/learn-n-more-about-boxing-handbook-guide-for-kids-parents.pdf
    • http://www.gorillawalker.com/feeding-the-dragon-kindle-edition.pdf
    • http://www.gorillawalker.com/norway-sweden-and-denmark-handbook-for-travellers.pdf
    • http://www.gorillawalker.com/aquaman-vol-6-maelstrom-the-new-52.pdf
    • http://www.gorillawalker.com/hemovigilance-an-effective-tool-for-improving-transfusion-safety.pdf
    • http://www.gorillawalker.com/the-conferences-of-john-cassian.pdf
    • http://www.gorillawalker.com/encyclopaedia-of-geomorphology.pdf
    • http://www.gorillawalker.com/robot-cognition-and-navigation-an-experiment-with-mobile-robots-cognitive.pdf
    • http://www.gorillawalker.com/private-international-law-in-india.pdf
    • http://www.gorillawalker.com/confucianism-a-very-short-introduction-very-short-introductions.pdf
    • http://www.gorillawalker.com/abraham-lincoln-as-a-man-of-ideas.pdf
    • http://www.gorillawalker.com/jezebel.pdf
    • http://www.gorillawalker.com/dawn-to-the-west-japanese-literature-in-the-modern-era.pdf
    • http://www.gorillawalker.com/juicing-with-the-omega-juicer-nourish-and-detox-your-body.pdf
    • http://www.gorillawalker.com/narrative-and-culture.pdf
    • http://www.gorillawalker.com/the-intellectual-origins-of-the-european-reformation.pdf
    • http://www.gorillawalker.com/2013-frogs.pdf
    • http://www.gorillawalker.com/julia-wants-a-pet.pdf
    • http://www.gorillawalker.com/board-feel-the-sport-on-your-mobile-sport-visions-spanish.pdf
    • http://www.gorillawalker.com/organizing-your-practices-a-new-swimming-manual.pdf
    • http://www.gorillawalker.com/vitamins-and-minerals-the-official-guide-to-vitamins-and-supplements.pdf
    • http://www.gorillawalker.com/corrosion-control-for-offshore-structures-cathodic-protection-and-high-efficiency.pdf
    • http://www.gorillawalker.com/zen-and-the-art-of-recording.pdf
    • http://www.gorillawalker.com/in-autumn-op-11-full-score-a5639.pdf
    • http://www.gorillawalker.com/60-days-math-division-series-4-digit-dividends-4-digit.pdf
    • http://www.gorillawalker.com/foolish-me.pdf
    • http://www.gorillawalker.com/adding-english-a-guide-to-teaching-in-multilingual-classrooms.pdf
    • http://www.gorillawalker.com/prentice-hall-health-professional-s-drug-guide-2007-2008-pearson.pdf
    • http://www.gorillawalker.com/blitzer-college-algebra-annotated-instructor-edition.pdf
    • http://www.gorillawalker.com/the-abyss-morland-dynasty.pdf
    • http://www.gorillawalker.com/bundle-cengage-advantage-books-abnormal-psychology-7th-aplia-1-term.pdf
    • http://www.gorillawalker.com/motorcycles-step-into-reading.pdf
    • http://www.gorillawalker.com/ultimate-smoothies-delicious-recipes-for-over-125-of-the-best.pdf
    • http://www.gorillawalker.com/bondage-dungeon-an-erotic-femdom-romp.pdf
    • http://www.gorillawalker.com/milf-fantasies-exchange-student-taboo-older-woman-younger-man.pdf
    • http://www.gorillawalker.com/starwater-strains.pdf
    • http://www.gorillawalker.com/happiness-is-20-notecards-and-envelopes.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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