Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d746c4681b1296b…

MALICIOUS

PDF

34.9 KB Created: 2019-12-14 06:41:34 +03:00 Authoring application: LaTeX with hyperref package (via pdfTeX-1.40.17)
MD5: 3a7cd5caeffab713975f09c257947210 SHA-1: be4c825e131e665e33b7d95028dfe4e75dc7c1d6 SHA-256: 8d746c4681b1296b901e5bd165b3979b967cba2a6bbea2da78b49e3e9f75525c
90 Risk Score

Malware Insights

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

The PDF was flagged by a critical heuristic for containing a large number of external links, indicating a potential link farm or redirection scheme. The ML classifier also assigned a high probability of maliciousness. While no scripts were extracted, the sheer volume of embedded URLs pointing to external PDF documents suggests an attempt to manipulate search engine rankings or to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8263

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/ambitos-del-parentesco-la-sociedad-maya-en-tiempos-de-la.pdf
    • http://www.gorillawalker.com/the-racing-driver-the-theory-and-practice-of-fast-driving.pdf
    • http://www.gorillawalker.com/finanzmathematik-die-berechnung-des-fairen-europ-ischen-call-und-put.pdf
    • http://www.gorillawalker.com/christian-theology-3-volume-set.pdf
    • http://www.gorillawalker.com/feral-rewilding-the-land-sea-and-human-life.pdf
    • http://www.gorillawalker.com/chicken-soup-for-the-soul-the-power-of-positive-101.pdf
    • http://www.gorillawalker.com/goddesses-goddesses.pdf
    • http://www.gorillawalker.com/dictionary-of-the-ancient-near-east.pdf
    • http://www.gorillawalker.com/ada-design-errors.pdf
    • http://www.gorillawalker.com/herpes-zoster-in-a-child-case-of-the-month-an.pdf
    • http://www.gorillawalker.com/transatlantic-roots-music-folk-blues-and-national-identities-american-made.pdf
    • http://www.gorillawalker.com/therapy-with-tough-clients.pdf
    • http://www.gorillawalker.com/dictionary-of-biological-psychology.pdf
    • http://www.gorillawalker.com/avaiyo-chapter-032-due-process-kindle-edition.pdf
    • http://www.gorillawalker.com/business-consulting-a-guide-to-how-it-works-and-how.pdf
    • http://www.gorillawalker.com/the-dirichlet-problem-with-l2-boundary-data-for-elliptic-linear.pdf
    • http://www.gorillawalker.com/black-magic-woman.pdf
    • http://www.gorillawalker.com/gu-a-de-roma-para-viajeros-primerizos-y-reincidentes-spanish.pdf
    • http://www.gorillawalker.com/my-home-your-home-cloverleaf-books-alike-and-different.pdf
    • http://www.gorillawalker.com/st-sepulchres-oxford-s-gloomy-cemetery.pdf
    • http://www.gorillawalker.com/i-wouldn-t-let-him-pull-out-kindle-edition.pdf
    • http://www.gorillawalker.com/the-encyclopedia-of-autism-spectrum-disorders-autism-spectrum-disorders-facts.pdf
    • http://www.gorillawalker.com/anales-de-la-universidad-de-chile-volume-77-spanish-edition.pdf
    • http://www.gorillawalker.com/nemi-roadmap-high-hopes-for-portables-sip-fastest-growing-package.pdf
    • http://www.gorillawalker.com/length-matching-for-high-speed-differential-pairs-loops-and-serpentines.pdf
    • http://www.gorillawalker.com/amc-map-baxter-state-park-katahdin-and-100-mile-wilderness.pdf
    • http://www.gorillawalker.com/accidental-reunion-kindle-edition.pdf
    • http://www.gorillawalker.com/building-secure-software-how-to-avoid-security-problems-the-right.pdf
    • http://www.gorillawalker.com/secretos-del-yoga-secrets-of-yoga-spanish-edition.pdf
    • http://www.gorillawalker.com/the-art-of-war-for-executives-ancient-knowledge-for-today.pdf
    • http://www.gorillawalker.com/best-tea-shop-walks-in-south-and-west-wales.pdf
    • http://www.gorillawalker.com/the-developing-person-through-the-life-span-development-portal.pdf
    • http://www.gorillawalker.com/systematic-interviewing-communication-skills-for-professional-effectiveness.pdf
    • http://www.gorillawalker.com/where-people-fly-and-water-runs-uphill-using-dreams-to.pdf
    • http://www.gorillawalker.com/the-feminine-mistake-are-we-giving-up-too-much.pdf
    • http://www.gorillawalker.com/101-law-forms-for-personal-use-101-law-forms-for.pdf
    • http://www.gorillawalker.com/the-toyota-way-14-management-principles-from-the-world-s.pdf
    • http://www.gorillawalker.com/never-be-boring-again.pdf
    • http://www.gorillawalker.com/saint-paul-returns-to-the-movies-triumph-over-shame.pdf
    • http://www.gorillawalker.com/sonny-s-blues-penguin-60s.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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