Malicious PDF — malware analysis report

Static analysis result for SHA-256 b57974d939db2471…

MALICIOUS

PDF

45.1 KB Created: 2018-12-02 20:17:57 +03:00 Authoring application: TeX (via MiKTeX pdfTeX-1.40.9)
MD5: 277c97c92c4a12724ae54a36dca7dce1 SHA-1: fde012c3b338faba5a00f78f02f06f386747f59f SHA-256: b57974d939db2471045604bd1af7436a0e3bf39d041bd935be6a9759b11bbd71
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment

The PDF contains a large number of embedded links to external PDF files, a technique often used for SEO manipulation or to distribute malicious content. The ML classifier also flagged this PDF as malicious. No scripts were extracted from this sample, and the document body was not parsable. The primary attack pattern observed is the creation of a link farm pointing to various PDF documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8634

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/batman-war-games-act-one.pdf
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    • http://www.gorillawalker.com/facts-and-values-an-introduction-to-critical-thinking-for-nurses.pdf
    • http://www.gorillawalker.com/miedo-vivir-en-el-presente-para-superar-nuestros-temores-spanish.pdf
    • http://www.gorillawalker.com/a-pride-of-african-tales.pdf
    • http://www.gorillawalker.com/the-pictorial-history-of-knives-daggers-bayonets.pdf
    • http://www.gorillawalker.com/health-wealth-and-medicines-for-all-regulating-the-pharmaceutical-industry.pdf
    • http://www.gorillawalker.com/avicenna-on-the-healing-properties-of-minerals-plants-herbs-and.pdf
    • http://www.gorillawalker.com/hydrodynamic-lubrication-volume-33-bearings-and-thrust-bearings-tribology-and.pdf
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    • http://www.gorillawalker.com/pretty-young-things-2-kindle-edition.pdf
    • http://www.gorillawalker.com/plato-complete-works-historical-background-and-modern-interpretation-of-plato.pdf
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    • http://www.gorillawalker.com/by-suzanne-m-miller-how-to-be-pre-med-a.pdf
    • http://www.gorillawalker.com/technology-integration-in-higher-education-social-and-organizational-aspects-premier.pdf
    • http://www.gorillawalker.com/goebbels.pdf
    • http://www.gorillawalker.com/prof-arnold-ehret-s-thus-speaketh-the-stomach-and-the.pdf
    • http://www.gorillawalker.com/the-great-monologues-from-the-est-marathon-monologue-audition-series.pdf
    • http://www.gorillawalker.com/spawn-of-the-flames-terror-trios-featuring-wayne-rogers.pdf
    • http://www.gorillawalker.com/31-days-to-becoming-a-happy-wife.pdf
    • http://www.gorillawalker.com/the-death-of-a-cat-a-search-for-hope.pdf
    • http://www.gorillawalker.com/farocki-godard-film-as-theory-film-culture-in-transition.pdf
    • http://www.gorillawalker.com/fundamentals-of-options-market.pdf
    • http://www.gorillawalker.com/traumdeutung.pdf
    • http://www.gorillawalker.com/all-for-god-s-glory-redeeming-church-scutwork.pdf
    • http://www.gorillawalker.com/handbook-of-transrectal-ultrasound-and-biopsy-of-the-prostate.pdf
    • http://www.gorillawalker.com/a-century-and-some-change-my-life-before-the-president.pdf
    • http://www.gorillawalker.com/journal-minnesota-trip-1861.pdf
    • http://www.gorillawalker.com/giuseppe-verdi-la-traviata-in-full-score.pdf
    • http://www.gorillawalker.com/a-comer-y-a-beber-con-las-manos-en-la.pdf
    • http://www.gorillawalker.com/bridge-for-bright-beginners-kindle-edition.pdf
    • http://www.gorillawalker.com/pseudo-cyril-of-jerusalem-on-the-life-and-the-passion.pdf
    • http://www.gorillawalker.com/flint-faience-tiles-a-to-z-schiffer-book-for-collectors.pdf
    • http://www.gorillawalker.com/physical-methods-in-heterocyclic-chemistry-general-heterocyclic-chemistry.pdf
    • http://www.gorillawalker.com/cond-gde-choral-orc-e-book-eb.pdf
    • http://www.gorillawalker.com/die-ameise-oder-bemerkungen-charakterz-ge-und-anekdoten-auch-schlachtberichte.pdf
    • http://www.gorillawalker.com/historical-atlas-of-armenia.pdf
    • http://www.gorillawalker.com/health-wealth-and-medicines-for-all-regulating-the-pharmaceu
    • 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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