Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8063531464c5065…

MALICIOUS

PDF

44.6 KB Created: 2018-12-15 08:09:46 +03:00 Authoring application: calibre 0.9.31 [http://calibre-ebook.com]
MD5: 9f9ff7897819031e9532f50c524ac0e2 SHA-1: 21d6753688593c5d82b156c679c1b8e1e8beea75 SHA-256: e8063531464c5065c5f52dca1502878811f8fd3b30b27a99c95b2898bb857c28
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a heuristic firing for a large external link farm, pointing to numerous PDF files on the domain www.gorillawalker.com. While no malicious scripts were extracted, the sheer volume of links suggests an attempt to manipulate search engine results or to distribute a large number of potentially malicious documents. The ML classifier also flagged the PDF as malicious with a high score.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8439

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/an-eye-control-teaching-device-for-students-without-language-expressive.pdf
    • http://www.gorillawalker.com/photonics-and-lasers-an-introduction.pdf
    • http://www.gorillawalker.com/the-art-of-column-writing-insider-secrets-from-art-buchwald.pdf
    • http://www.gorillawalker.com/riemann-surfaces-by-way-of-complex-analytic-geometry-graduate-studies.pdf
    • http://www.gorillawalker.com/verilog-digital-logic-circuit-design-experiments-korean-edition.pdf
    • http://www.gorillawalker.com/an-introduction-to-space-law.pdf
    • http://www.gorillawalker.com/chinese-auricular-acupuncture-second-edition.pdf
    • http://www.gorillawalker.com/abstract-algebra-3rd-edition.pdf
    • http://www.gorillawalker.com/rti-and-the-adolescent-reader-responsive-literacy-instruction-in-secondary.pdf
    • http://www.gorillawalker.com/pilot-radio-s-communications-handbook.pdf
    • http://www.gorillawalker.com/against-all-odds-famous-and-infamous-women-of-china-and.pdf
    • http://www.gorillawalker.com/god-made-it-for-you-the-story-of-creation.pdf
    • http://www.gorillawalker.com/fortschritte-der-echokardiographie-german-edition.pdf
    • http://www.gorillawalker.com/deceitfully-yours.pdf
    • http://www.gorillawalker.com/philosophy-of-personal-identity-and-multiple-personality-routledge-studies-in.pdf
    • http://www.gorillawalker.com/commercial-bank-management.pdf
    • http://www.gorillawalker.com/civics-today-citizenship-economics-you-alabama-edition.pdf
    • http://www.gorillawalker.com/gotz-and-meyer.pdf
    • http://www.gorillawalker.com/casseroles-by-dan-home-cooked-casseroles-kindle-edition.pdf
    • http://www.gorillawalker.com/autism-access-and-inclusion-on-the-front-line-confessions-of.pdf
    • http://www.gorillawalker.com/buddhism-an-introduction-i-b-tauris-introductions-to-religion.pdf
    • http://www.gorillawalker.com/solomon-s-sword-a-practical-guide-to-conducting-child-custody.pdf
    • http://www.gorillawalker.com/the-power-of-six-six-plus-one-science-fiction-short.pdf
    • http://www.gorillawalker.com/beginning-mandolin-book-cd.pdf
    • http://www.gorillawalker.com/corcovado-a-conquista-da-montanha-de-deus-a-historia-da.pdf
    • http://www.gorillawalker.com/tots-tv-big-treasure-adventure.pdf
    • http://www.gorillawalker.com/infectious-disease-management-in-animal-shelters.pdf
    • http://www.gorillawalker.com/a-unique-life-an-autobiography-complete-with-misdeeds.pdf
    • http://www.gorillawalker.com/integrated-biorefineries-design-analysis-and-optimization-green-chemistry-and-chemical.pdf
    • http://www.gorillawalker.com/dancing-in-the-sky-a-story-of-hope-for-grieving.pdf
    • http://www.gorillawalker.com/top-ten-sights-warsaw-kindle-edition.pdf
    • http://www.gorillawalker.com/the-duckster-tales-duckster-s-big-dream-kindle-edition.pdf
    • http://www.gorillawalker.com/the-extreme-life-of-the-sea.pdf
    • http://www.gorillawalker.com/christian-children-s-favorites-the-phillip-keverenseries-beginning-piano-solos.pdf
    • http://www.gorillawalker.com/kamishibai-boards-a-lean-visual-management-system-that-supports-layered.pdf
    • http://www.gorillawalker.com/listening-skills-better-listening-better-communication-self-hypnosis-hypnotherapy-cd.pdf
    • http://www.gorillawalker.com/in-the-shade-of-the-qur-an-vol-10-fi.pdf
    • http://www.gorillawalker.com/angry-candy.pdf
    • http://www.gorillawalker.com/selections-from-the-notebook-for-anna-magdalena-bach-developing-artist.pdf
    • http://www.gorillawalker.com/modern-british-drama-the-twentieth-century.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://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#
    • http://www.aiim.org/pdfa/ns/id/

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