Malicious PDF — malware analysis report

Static analysis result for SHA-256 20911feff1a596fe…

MALICIOUS

PDF

46.9 KB Created: 2018-11-30 20:08:47 +03:00 Authoring application: Adobe PageMaker 6.5 (via Acrobat Distiller 3.0 for Windows)
MD5: b4d64f3dea1d87834b9c3ad08ffe7feb SHA-1: e1b9ec1cf2883fd360d79cd9e0b44cead0998e06 SHA-256: 20911feff1a596fe59092370caccc708f7ce7349564667b54aacc6d6cb767ce2
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF contains a large number of embedded links to external PDF files, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged this document as malicious. The primary purpose appears to be directing users to a website hosting numerous PDF documents, potentially for SEO manipulation or as a distribution point for further malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8527

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/collins-first-whiteboard-atlas-collins-primary-atlases.pdf
    • http://www.gorillawalker.com/fodor-s-argentina-3rd-edition-fodor-s-gold-guides.pdf
    • http://www.gorillawalker.com/data-science-learn-the-what-where-and-how-of-data.pdf
    • http://www.gorillawalker.com/silence-of-a-soldier.pdf
    • http://www.gorillawalker.com/annual-report-to-congress-of-the-federal-board-for-vocational.pdf
    • http://www.gorillawalker.com/oh-beautiful-a-screenplay.pdf
    • http://www.gorillawalker.com/primary-journal-kindergarten-2nd-grade.pdf
    • http://www.gorillawalker.com/when-the-brain-can-t-hear-unraveling-the-mystery-of.pdf
    • http://www.gorillawalker.com/the-mojo-collection-the-greatest-albums-of-all-time-and.pdf
    • http://www.gorillawalker.com/the-oxford-paperback-dictionary-and-thesaurus.pdf
    • http://www.gorillawalker.com/tax-accounting-in-mergers-and-acquisitions-2015-edition.pdf
    • http://www.gorillawalker.com/the-prentice-hall-essentials-dictionary-of-culinary-arts.pdf
    • http://www.gorillawalker.com/the-dream-dictionary-from-a-to-z-the-ultimate-a.pdf
    • http://www.gorillawalker.com/how-to-be-brilliant-at-public-speaking-2e-learn-the.pdf
    • http://www.gorillawalker.com/crystal-enchantments-a-complete-guide-to-stones-and-their-magical.pdf
    • http://www.gorillawalker.com/the-nympho-librarian-and-other-stories.pdf
    • http://www.gorillawalker.com/tang-dai-yuan-lin-bie-ye-kao-lun-zhou-qin.pdf
    • http://www.gorillawalker.com/iutam-symposium-on-mechanics-of-granular-and-porous-materials-proceedings.pdf
    • http://www.gorillawalker.com/finite-difference-schemes-and-partial-differential-equations.pdf
    • http://www.gorillawalker.com/i-lost-my-penis-gender-bending-gender-transformation-group-erotica.pdf
    • http://www.gorillawalker.com/rock-house-method-learn-bass-1-bass-guitar-cd.pdf
    • http://www.gorillawalker.com/the-cassell-dictionary-of-anecdotes-1000-entertaining-anecdotes-on-themes.pdf
    • http://www.gorillawalker.com/conformal-projections-in-geodesy-and-cartography-united-states-coast-and.pdf
    • http://www.gorillawalker.com/sylvia-please-don-t-be-dead.pdf
    • http://www.gorillawalker.com/the-way-life-works-the-science-lover-s-illustrated-guide.pdf
    • http://www.gorillawalker.com/grammar-sense-2b-student-book-with-online-practice-access-code.pdf
    • http://www.gorillawalker.com/dark-star-digital.pdf
    • http://www.gorillawalker.com/they-called-them-greasers-anglo-attitudes-toward-mexicans-in-texas.pdf
    • http://www.gorillawalker.com/controversies-in-the-treatment-of-lung-cancer-12th-international-symposium.pdf
    • http://www.gorillawalker.com/platon-obras-selectas-series-spanish-edition.pdf
    • http://www.gorillawalker.com/an-bord-der-smaragdsturm-ryria-4-german-edition.pdf
    • http://www.gorillawalker.com/handbook-on-spanish-employment-law.pdf
    • http://www.gorillawalker.com/no-need-to-panic-a-m-best-insists-financial-integrity.pdf
    • http://www.gorillawalker.com/let-s-play-jazz-more-complete-method-for-beginners.pdf
    • http://www.gorillawalker.com/bouddha-world-cultural-heritage-library.pdf
    • http://www.gorillawalker.com/the-songwriters-idea-book-40-strategies-to-excite-your-imagination.pdf
    • http://www.gorillawalker.com/betty-friedan-a-voice-for-women-s-rights-women-of.pdf
    • http://www.gorillawalker.com/minus-equals-plus.pdf
    • http://www.gorillawalker.com/respiratory-care-the-official-journal-of-the-american-association-for.pdf
    • http://www.gorillawalker.com/jungle-surprises-i-am-a-reader-tugg-and-teeny.pdf
    • http://www.gorillawalker.com/when-the-br
    • 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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