Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fd184739e690dad…

MALICIOUS

PDF

44.2 KB Created: 2018-11-30 20:55:42 +03:00 Authoring application: - (via Acrobat Distiller 5.0.1 for Macintosh)
MD5: 52521dd0a1651fa87678307cb004d995 SHA-1: 7aea5f891c0371f39654d943a878b672ba897911 SHA-256: 1fd184739e690dadb159496270d73ab4a989b8382b312e192322e2bcf90c3e6e
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a heuristic firing for a large number of external PDF links, suggesting a link farm. The ML classifier also flagged the document as malicious. The primary attack pattern involves directing users to a multitude of PDF files hosted on 'gorillawalker.com', likely to manipulate search engine results or distribute further malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9171

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/interactive-sensing-and-decision-making-in-social-networks-foundations-and.pdf
    • http://www.gorillawalker.com/the-gunner.pdf
    • http://www.gorillawalker.com/the-windows-xp-2000-answer-book-a-complete-resource-from.pdf
    • http://www.gorillawalker.com/are-you-ready-thin-lizzy-album-by-album.pdf
    • http://www.gorillawalker.com/turfgrass-biology-use-and-management-agronomy-monograph.pdf
    • http://www.gorillawalker.com/celtic-crosses-of-britain-and-ireland-shire-archaeology.pdf
    • http://www.gorillawalker.com/lpn-to-rn-transitions-2e-2nd-edition-by-claywell-msn.pdf
    • http://www.gorillawalker.com/the-dance-boots-flannery-o-connor-award-for-short-fiction.pdf
    • http://www.gorillawalker.com/the-casey-anthony-murder-trial-unabridged-audible-audio-edition.pdf
    • http://www.gorillawalker.com/the-art-of-thought.pdf
    • http://www.gorillawalker.com/reeves-cook-debate-on-baptism.pdf
    • http://www.gorillawalker.com/te-presento-al-mamut-meet-the-mammoth-level-p-lectores.pdf
    • http://www.gorillawalker.com/the-adventures-of-isabel-a-poetry-speaks-experience.pdf
    • http://www.gorillawalker.com/diabetic-foot-care-case-studies-in-clinical-management.pdf
    • http://www.gorillawalker.com/string-quartet-op-54-2-c-major-hob-iii-58.pdf
    • http://www.gorillawalker.com/el-management-y-sus-innovaciones-spanish-edition-kindle-edition.pdf
    • http://www.gorillawalker.com/gleb-kosorukov-heroes-of-labour-or-100-from-the-stakhanov.pdf
    • http://www.gorillawalker.com/molecular-spectroscopy-electronic-structure-and-intramolecular-interactions-theoretical-models-of.pdf
    • http://www.gorillawalker.com/the-rancho-de-chimayo-cookbook-the-traditional-cooking-of-new.pdf
    • http://www.gorillawalker.com/cuentas-pendientes-los-c.pdf
    • http://www.gorillawalker.com/encyclopedia-of-the-modern-middle-east-and-north-africa.pdf
    • http://www.gorillawalker.com/the-winner-s-crime-the-winner-s-trilogy-book-2.pdf
    • http://www.gorillawalker.com/iso-8633-1992-solid-fertilizers-simple-sampling-method-for-small.pdf
    • http://www.gorillawalker.com/riding-lawn-mower-service-manual-volume-2-1992-and-later.pdf
    • http://www.gorillawalker.com/eu-energy-legislation-and-case-law-handbook-2014-eu-geo.pdf
    • http://www.gorillawalker.com/handbook-of-blood-banking-and-transfusion-medicine-with-cd-rom.pdf
    • http://www.gorillawalker.com/congress-at-war-the-politics-of-conflict-since-1789.pdf
    • http://www.gorillawalker.com/tomie-s-mother-goose-flies-again.pdf
    • http://www.gorillawalker.com/the-essential-digital-interview-handbook-lights-camera-interview-tips-for.pdf
    • http://www.gorillawalker.com/soft-nanoparticles-for-biomedical-applications-rsc-rsc-nanoscience-nanotechnology.pdf
    • http://www.gorillawalker.com/the-hollywood-prince-a-novel-of-old-hollywood.pdf
    • http://www.gorillawalker.com/into-the-goddesslands-the-goddesslands-trilogy-volume-1.pdf
    • http://www.gorillawalker.com/stephens-visual-basic-programming-24-hour-trainer.pdf
    • http://www.gorillawalker.com/in-the-gap-small-group-kit.pdf
    • http://www.gorillawalker.com/exploring-europe-grades-5-8-continents-of-the-world.pdf
    • http://www.gorillawalker.com/critical-phenomena-at-surfaces-and-interfaces-evanescent-x-ray-and.pdf
    • http://www.gorillawalker.com/cherries-and-cherry-pits.pdf
    • http://www.gorillawalker.com/gay-cowboys-stories-bundle-1-broker-ranch-cowboys-trilogy-gay.pdf
    • http://www.gorillawalker.com/mongolia-v2-the-tangut-country-and-the-solitudes-of-northern.pdf
    • http://www.gorillawalker.com/from-the-ashes-chronicles-of-the-shifter-directive-7-siren.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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