Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5d38c0b758a857e…

MALICIOUS

PDF

41.2 KB Created: 2018-12-14 20:04:31 +03:00 Authoring application: Acrobat PDFMaker 11 for Word (via Acrobat Distiller 11.0 (Windows))
MD5: 92609405695294c9b70db479073c6191 SHA-1: ba3bb4245f7baf3e69d64eec1d9408e6b1900ebe SHA-256: b5d38c0b758a857ef5bc287975fa360cb900176fe591cb618f5bb207f0b72347
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF was flagged by a machine learning classifier as malicious and contains a large number of embedded external links to PDF files on the same domain. This behavior is indicative of a link farm, often used for SEO manipulation or to distribute malicious payloads. The document body itself is heavily obfuscated and does not provide clear textual lures, but the sheer volume of links suggests a non-legitimate purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9181

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/telsiks-99-4th-international-conference-on-telecommunications-in-modern-satellite.pdf
    • http://www.gorillawalker.com/age-of-heroes.pdf
    • http://www.gorillawalker.com/nonlinear-system-identification-narmax-methods-in-the-time-frequency-and.pdf
    • http://www.gorillawalker.com/essential-wordstar-with-mailmerge-and-spellstar-the-essential-series.pdf
    • http://www.gorillawalker.com/pharmaceutical-calculations-13th-edition.pdf
    • http://www.gorillawalker.com/exposicion-razonada-y-estudio-comparativo-del-c-digo-civil-chileno.pdf
    • http://www.gorillawalker.com/snow-leopards-big-cats.pdf
    • http://www.gorillawalker.com/cooksville-second-wave-long-buried-secrets-in-a-small-town.pdf
    • http://www.gorillawalker.com/new-zealand-globetrotter-travel-atlas-by-lay-graeme-2011-paperback.pdf
    • http://www.gorillawalker.com/a-day-of-dragon-blood-dragonlore-book-2-paperback.pdf
    • http://www.gorillawalker.com/breaking-bread-in-l-aquila.pdf
    • http://www.gorillawalker.com/ultimate-autos-the-kings-of-bling.pdf
    • http://www.gorillawalker.com/home-networking-technologies-and-standards-artech-house-telecommunications-library.pdf
    • http://www.gorillawalker.com/caravan-kidd-vol-1.pdf
    • http://www.gorillawalker.com/personal-disaster-planning-handbook.pdf
    • http://www.gorillawalker.com/breaking-new-ground-conservation-classics.pdf
    • http://www.gorillawalker.com/the-consolations-of-writing-literary-strategies-of-resistance-from-boethius.pdf
    • http://www.gorillawalker.com/cathodic-protection-of-reinforced-concrete-bridge-decks.pdf
    • http://www.gorillawalker.com/nacidos-en-mauthausen-testimonios-y-memori-spanish-edition.pdf
    • http://www.gorillawalker.com/health-and-environmental-safety-of-nanomaterials-polymer-nancomposites-and-other.pdf
    • http://www.gorillawalker.com/the-derrick-s-hand-book-of-petroleum-a-complete-chronological.pdf
    • http://www.gorillawalker.com/the-genius-of-money-essays-and-interviews-reimagining-the-financial.pdf
    • http://www.gorillawalker.com/youtube-marketing-handbook.pdf
    • http://www.gorillawalker.com/matrimonio-de-amor-matrimonio-de-estado-vida-de-alfonso-xii.pdf
    • http://www.gorillawalker.com/orientation-swap-px-the-priest-gay-erotica.pdf
    • http://www.gorillawalker.com/symphony-no-7-in-b-minor-d-759-unfinished-symphony.pdf
    • http://www.gorillawalker.com/gamma-2001-gamma-ray-astrophysics-2001-baltimore-maryland-4-6.pdf
    • http://www.gorillawalker.com/osborne-little-style-decorating-themes-and-combinations.pdf
    • http://www.gorillawalker.com/guide-to-anura-132-dhapura.pdf
    • http://www.gorillawalker.com/marrakesh-express-un-avventura-fai-da-te-in-marocco-italian.pdf
    • http://www.gorillawalker.com/the-architecture-of-mckim-mead-and-white-1879-1915.pdf
    • http://www.gorillawalker.com/endangered-animals-of-the-jungle-library-bound-time-for-kids.pdf
    • http://www.gorillawalker.com/trick-r-treat-days-of-the-dead.pdf
    • http://www.gorillawalker.com/the-letters-of-john-of-salisbury-volume-2-the-later.pdf
    • http://www.gorillawalker.com/owning-the-beast-kindle-edition.pdf
    • http://www.gorillawalker.com/messe-solenelle-kalmus-edition.pdf
    • http://www.gorillawalker.com/cura-vegetariana-de-la-artritis-spanish-edition.pdf
    • http://www.gorillawalker.com/an-introduction-to-probability-theory.pdf
    • http://www.gorillawalker.com/complete-hydrangeas.pdf
    • http://www.gorillawalker.com/never-just-a-game-players-owners-and-american-baseball-to.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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