Malicious PDF — malware analysis report

Static analysis result for SHA-256 8503e3b6930c1b27…

MALICIOUS

PDF

41.2 KB Created: 2019-03-17 10:25:14 +03:00 Authoring application: TeX (via pdfTeX-1.40.17)
MD5: 52f1b7c03fae395fa66c6450551f89b5 SHA-1: 4fe437bdc83dfb8d4594a3ef42706d0dcad7ece9 SHA-256: 8503e3b6930c1b270df6734ca79103a023c276c4f92a569a880cbded11e1719d
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs pointing to external PDF files, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged the document as malicious. While no scripts were extracted, the sheer volume of links suggests an attempt to manipulate search engine results or distribute potentially malicious content through these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8872

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/hot-dog-a-melanie-travis-mystery-melanie-travis-mysteries.pdf
    • http://www.gorillawalker.com/history-of-telegraphy-i-e-e-history-of-technology-series.pdf
    • http://www.gorillawalker.com/cardiac-care-nursing-and-health-survival-guides.pdf
    • http://www.gorillawalker.com/hvac-level-4-trainee-guide-4th-edition.pdf
    • http://www.gorillawalker.com/xenotransplantation-the-transplantation-of-organs-and-tissues-between-species.pdf
    • http://www.gorillawalker.com/spatial-representation-in-animals.pdf
    • http://www.gorillawalker.com/bretherick-s-handbook-of-reactive-chemical-hazards.pdf
    • http://www.gorillawalker.com/innocent-mosquitoes.pdf
    • http://www.gorillawalker.com/star-wars-rebels-ezra-s-gamble.pdf
    • http://www.gorillawalker.com/black-tie-optional-a-complete-special-events-resource-for-nonprofit.pdf
    • http://www.gorillawalker.com/english-dutch-phrasebook-and-3000-word-topical-vocabulary.pdf
    • http://www.gorillawalker.com/calhouse-i-leonis-manor-kindle-edition.pdf
    • http://www.gorillawalker.com/nineteenth-century-art-a-critical-history-fourth-edition.pdf
    • http://www.gorillawalker.com/still-life-in-ditch.pdf
    • http://www.gorillawalker.com/women-of-color-pray-voices-of-strength-faith-healing-hope.pdf
    • http://www.gorillawalker.com/looker-a-novel.pdf
    • http://www.gorillawalker.com/spacesuit-a-history-through-fact-and-fiction.pdf
    • http://www.gorillawalker.com/caregiver-burden-in-dementia-profile-and-factors-associated-for-higher.pdf
    • http://www.gorillawalker.com/the-art-of-catching-the-secrets-and-techniques-of-baseball.pdf
    • http://www.gorillawalker.com/somme-campaign.pdf
    • http://www.gorillawalker.com/green-structures-energy-efficient-buildings.pdf
    • http://www.gorillawalker.com/barbarian-migrations-and-the-roman-west-376-568-cambridge-medieval.pdf
    • http://www.gorillawalker.com/young-bass-reeves-the-life-of-the-first-black-marshal.pdf
    • http://www.gorillawalker.com/nagarjuna-s-twelve-gate-treatise-translated-with-introductory-essays-comments.pdf
    • http://www.gorillawalker.com/growing-plantation-forests.pdf
    • http://www.gorillawalker.com/adaptive-electricity-energy-saving-strategy-for-industrial-motors-a-hybrid.pdf
    • http://www.gorillawalker.com/enjoying-my-lovers-as-my-husband-watches-sensual-heterotica.pdf
    • http://www.gorillawalker.com/legal-loopholes-credit-repair-tactics-esposed.pdf
    • http://www.gorillawalker.com/nathan-bedford-forrest-in-search-of-the-enigma.pdf
    • http://www.gorillawalker.com/the-ladder-of-the-beatitudes.pdf
    • http://www.gorillawalker.com/introduction-to-reasoning.pdf
    • http://www.gorillawalker.com/l-exil-french-edition.pdf
    • http://www.gorillawalker.com/gestures-the-do-s-and-taboos-of-body-language-around.pdf
    • http://www.gorillawalker.com/doctor-s-special-punishment-bdsm-enema-punishment-medical-play-kindle.pdf
    • http://www.gorillawalker.com/the-fall-of-mahkinoc-volume-i-of-the-shadowed-of.pdf
    • http://www.gorillawalker.com/women-leading-education-across-the-continents-overcoming-the-barriers.pdf
    • http://www.gorillawalker.com/enter-three-witches-kindle-edition.pdf
    • http://www.gorillawalker.com/arab-media-moguls-library-of-modern-middle-east-studies.pdf
    • http://www.gorillawalker.com/photography-the-media.pdf
    • http://www.gorillawalker.com/weird-weather-tales-of-astronomical-and-atmospheric-anomalies-astronomers-universe.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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