Malicious PDF — malware analysis report

Static analysis result for SHA-256 b536814871575bdd…

MALICIOUS

PDF

46.5 KB Created: 2018-12-14 20:14:02 +03:00 Authoring application: TopLeaf 7.6.056 (via iText 2.1.7 by 1T3XT)
MD5: 5a59ba0a0878030582d4a51a2bcb2777 SHA-1: 5c3309459b11bb914005f3a2d3cbf1215644957a SHA-256: b536814871575bddacb9fbe97a4fc50d73dd70210c46f7666728f893b29e8190
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links all point to PDFs hosted on the domain www.gorillawalker.com. The ML classifier also flagged this PDF as malicious. The document body appears to be malformed or encrypted, providing no direct clues to its intent beyond the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8013

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/love-detox-changing-normal-how-i-helped-my-husband-beat.pdf
    • http://www.gorillawalker.com/the-five-ancestors-book-6-mouse.pdf
    • http://www.gorillawalker.com/rage-a-love-story.pdf
    • http://www.gorillawalker.com/vegetarian-sauces-a-complete-collection-of-old-time-sauces.pdf
    • http://www.gorillawalker.com/crystallization-fourth-edition.pdf
    • http://www.gorillawalker.com/encyclopedia-of-pharmaceutical-technology-volume-4-design-of-drugs-to.pdf
    • http://www.gorillawalker.com/help-with-housing-costs-volume-1-guide-to-universal-credit.pdf
    • http://www.gorillawalker.com/haynes-chevrolet-full-size-sedans-1969-1990-manual-v6-and.pdf
    • http://www.gorillawalker.com/never-too-old-to-teach-how-middle-aged-wisdom-can.pdf
    • http://www.gorillawalker.com/new-in-chess-yearbook-102-the-chess-player-s-guide.pdf
    • http://www.gorillawalker.com/readings-on-native-son-literary-companion-series.pdf
    • http://www.gorillawalker.com/mojave-national-preserve-recreation-map-tom-harrison-maps.pdf
    • http://www.gorillawalker.com/31-facts-about-wisdom.pdf
    • http://www.gorillawalker.com/great-gardens-of-spain.pdf
    • http://www.gorillawalker.com/college-stress-solutions-stress-management-techniques-to-beat-anxiety-make.pdf
    • http://www.gorillawalker.com/head-and-neck-anatomy-a-clinical-reference.pdf
    • http://www.gorillawalker.com/neil-gaiman-s-neverwhere.pdf
    • http://www.gorillawalker.com/ms-frizzle-s-adventures-ancient-egypt.pdf
    • http://www.gorillawalker.com/the-best-american-travel-writing-2005-the-best-american-series.pdf
    • http://www.gorillawalker.com/my-visit-to-distressed-ireland.pdf
    • http://www.gorillawalker.com/teaching-the-levees-a-curriculum-for-democratic-dialogue-and-civic.pdf
    • http://www.gorillawalker.com/the-hidden-cure-the-five-laws-of-perfect-health.pdf
    • http://www.gorillawalker.com/speeches-that-changed-the-world-hardcover.pdf
    • http://www.gorillawalker.com/game-theory-under-mcdm-and-fuzzy-set-theory-some-problems.pdf
    • http://www.gorillawalker.com/star-wars-omnibus-dark-times-vol-1.pdf
    • http://www.gorillawalker.com/death-hunt.pdf
    • http://www.gorillawalker.com/textbook-of-the-fundus-of-the-eye.pdf
    • http://www.gorillawalker.com/flight-from-death.pdf
    • http://www.gorillawalker.com/he-ain-t-no-bun.pdf
    • http://www.gorillawalker.com/erythrocyte-structure-and-function-proceedings-of-the-third-international-conference.pdf
    • http://www.gorillawalker.com/toy-monster-the-big-bad-world-of-mattel.pdf
    • http://www.gorillawalker.com/good-enough-to-eat.pdf
    • http://www.gorillawalker.com/alexander-s-care-of-the-patient-in-surgery-12e-and.pdf
    • http://www.gorillawalker.com/the-songs-of-a-sentimental-bloke-text-classics.pdf
    • http://www.gorillawalker.com/the-civil-war-begins-opening-clashes-1861-fort-sumter-virginia.pdf
    • http://www.gorillawalker.com/from-slavery-to-freedom-v2-9th.pdf
    • http://www.gorillawalker.com/advances-in-nuclear-engineering-computation-and-radiation-shielding.pdf
    • http://www.gorillawalker.com/counter-clockwise-a-young-adult-time-travel-romance-the-clockwise.pdf
    • http://www.gorillawalker.com/zondervan-compact-bible-dictionary.pdf
    • http://www.gorillawalker.com/eye-movement-desensitization-and-reprocessing-emdr-therapy-scripted-protocols-and.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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