Malicious PDF — malware analysis report

Static analysis result for SHA-256 a731f7833ba16946…

MALICIOUS

PDF

31.7 KB Created: 2020-01-10 17:21:17 +03:00 Authoring application: calibre 2.23.0 [http://calibre-ebook.com]
MD5: 04d654c2d85837f562ad42d9eb4af326 SHA-1: 7bb617624ca864f823ecd097cb29970eaf99665e SHA-256: a731f7833ba1694673a749cbf00c685866b79481780fb198d2603f8abac5e8d9
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 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 further 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 0.8405

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/engage-a-practical-guide-to-evangelism-member-book.pdf
    • http://www.gorillawalker.com/superconductivity-2nd-07-by-jr-charles-p-poole-farach-horacio.pdf
    • http://www.gorillawalker.com/osceola-s-legacy-alabama-fire-ant.pdf
    • http://www.gorillawalker.com/beyond-the-third-dimension-geometry-computer-graphics-and-higher-dimensions.pdf
    • http://www.gorillawalker.com/betting-on-love-betting-on-love-1.pdf
    • http://www.gorillawalker.com/lizards-classroom-collection-6-titles.pdf
    • http://www.gorillawalker.com/good-people-beget-good-people-a-geneology-of-the-frist.pdf
    • http://www.gorillawalker.com/a-room-at-a-time-how-women-entered-party-politics.pdf
    • http://www.gorillawalker.com/in-search-of-lemuria.pdf
    • http://www.gorillawalker.com/brain-hacks-blueprint-for-a-smarter-and-happier-you-kindle.pdf
    • http://www.gorillawalker.com/coconut-oil-miracle-handbook.pdf
    • http://www.gorillawalker.com/how-to-exercise-when-you-re-expecting-for-the-9.pdf
    • http://www.gorillawalker.com/superbikes-street-racers-design-and-technology.pdf
    • http://www.gorillawalker.com/gender-issues-in-art-therapy.pdf
    • http://www.gorillawalker.com/creative-community-builder-s-handbook-how-to-transform-communities-using.pdf
    • http://www.gorillawalker.com/coming-home.pdf
    • http://www.gorillawalker.com/snake-bite-sherlock-holmes-the-legend-begins.pdf
    • http://www.gorillawalker.com/poland-a-guidebook-cultural-heritage-landscape-history-tourist-information.pdf
    • http://www.gorillawalker.com/berlin-falk-plan-german-edition.pdf
    • http://www.gorillawalker.com/writing-for-technical-professionals.pdf
    • http://www.gorillawalker.com/the-snow-goose.pdf
    • http://www.gorillawalker.com/children-in-the-holocaust-and-world-war-ii-children-s.pdf
    • http://www.gorillawalker.com/the-san-fernando-valley-america-s-suburb.pdf
    • http://www.gorillawalker.com/hong-kong-islands-peng-chau-island.pdf
    • http://www.gorillawalker.com/cognitive-disability-and-its-challenge-to-moral-philosophy.pdf
    • http://www.gorillawalker.com/bug-hunts-surviving-and-combating-the-alien-menace-dark.pdf
    • http://www.gorillawalker.com/industrial-hydraulics.pdf
    • http://www.gorillawalker.com/the-digital-diplomacy-handbook-how-to-use-social-media-to.pdf
    • http://www.gorillawalker.com/before-jutland-the-naval-war-in-northern-european-waters-august.pdf
    • http://www.gorillawalker.com/litigaci-n-penal-juicio-oral-y-prueba-spanish-edition.pdf
    • http://www.gorillawalker.com/the-winners-handbook-a-closer-look-at-judy-freeman-s.pdf
    • http://www.gorillawalker.com/the-fifth-letter.pdf
    • http://www.gorillawalker.com/autocad-2014-3d-modeling.pdf
    • http://www.gorillawalker.com/college-accounting-a-practical-approach-chapters-1-26-8th-edition.pdf
    • http://www.gorillawalker.com/jolly-lad-a-menk-anthology.pdf
    • http://www.gorillawalker.com/fischer-tropsch-synthesis-catalysts-and-catalysis-advances-and-applications-chemical.pdf
    • http://www.gorillawalker.com/special-events-the-roots-and-wings-of-celebration-wiley-event.pdf
    • http://www.gorillawalker.com/alto-adige-in-mountain-bike-vol-1-da-bolzano-a.pdf
    • http://www.gorillawalker.com/601-great-scrapbook-ideas.pdf
    • http://www.gorillawalker.com/eternity-base-unabridged-audible-audio-edition.pdf
    • http://www.gorillawalker.com/how-to-exercise-when-you-re-expecting-for-th
    • 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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