Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c4e4932a3d0523b…

MALICIOUS

PDF

43.5 KB Created: 2018-11-15 02:40:24 +03:00 Authoring application: - (via GPL Ghostscript 8.70)
MD5: 1b0741625146f42f1939e98d4f34d374 SHA-1: 98f5703d61cc4ee581ba9b8b0f4ae24908884dd5 SHA-256: 3c4e4932a3d0523b43278404898b7ddb8a8e6d26fe7e1dd9072cf5b9a55eaf1b
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to external PDF files, a technique often used for SEO manipulation or to distribute malware. The ML classifier also flagged this PDF as malicious. No scripts were extracted from this sample, and the document body was heavily obfuscated, limiting further analysis of the exact intent beyond the link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8452

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/whiskey-in-greece-to-2015-databook-download-pdf-digital.pdf
    • http://www.gorillawalker.com/side-saddle-threshold-picture-guides.pdf
    • http://www.gorillawalker.com/temporal-shift-dark-desires-volume-4.pdf
    • http://www.gorillawalker.com/a-dom-is-forever-masters-and-mercenaries-book-3-volume.pdf
    • http://www.gorillawalker.com/scientific-prehistory-a-sequel-of-prehistory-and-earth-models.pdf
    • http://www.gorillawalker.com/move-the-crowd.pdf
    • http://www.gorillawalker.com/hancock-s-half-hour-series-3-ten-episodes-of-the.pdf
    • http://www.gorillawalker.com/the-rational-male.pdf
    • http://www.gorillawalker.com/emily-posts-complete-book-of-wedding-etiquette.pdf
    • http://www.gorillawalker.com/invisible-money-hidden-assets-secret-accounts-kindle-edition.pdf
    • http://www.gorillawalker.com/jason-bittner-double-bass-drum-pro-method-book-cd-dvd.pdf
    • http://www.gorillawalker.com/bon-voyage-texas-edition-glencoe-french-level-2.pdf
    • http://www.gorillawalker.com/before-midnight-a-retelling-of-cinderella-once-upon-a-time.pdf
    • http://www.gorillawalker.com/beyond-obamacare-life-death-and-social-policy.pdf
    • http://www.gorillawalker.com/economics-through-infographics-super-social-studies-infographics-library-binding.pdf
    • http://www.gorillawalker.com/eaarth-eaarth-making-a-life-on-a-tough-new-planet.pdf
    • http://www.gorillawalker.com/visual-version-new-health-education-series-to-be-able-to.pdf
    • http://www.gorillawalker.com/rnotes-nurse-s-clinical-pocket-guide-2nd-edition-for-pdas.pdf
    • http://www.gorillawalker.com/lives-we-lost-the-fallen-world-trilogy-the.pdf
    • http://www.gorillawalker.com/microsoft-office-2007-introductory-concepts-and-techniques-premium-video-edition.pdf
    • http://www.gorillawalker.com/file-data-recovery-pc-hard-drive-data-recovery-usb-data.pdf
    • http://www.gorillawalker.com/latitudes-2-methode-de-francais-a2-b1-1cd-audio-french.pdf
    • http://www.gorillawalker.com/advanced-pavement-research-selected-peer-reviewed-papers-from-the-3rd.pdf
    • http://www.gorillawalker.com/new-rules-for-today-s-workplace-strategies-for-success-in.pdf
    • http://www.gorillawalker.com/strenthening-the-global-nuclear-safety-regime-insag-series.pdf
    • http://www.gorillawalker.com/learning-ipython-for-interactive-computing-and-data-visualization-kindle-edition.pdf
    • http://www.gorillawalker.com/blinded-the-tenderfoot-series-volume-2.pdf
    • http://www.gorillawalker.com/new-business-of-football.pdf
    • http://www.gorillawalker.com/a-field-guide-to-happiness-what-i-learned-in-bhutan.pdf
    • http://www.gorillawalker.com/microelectronics-circuit-analysis-and-design.pdf
    • http://www.gorillawalker.com/simple-pattern-building-techniques-how-to-art-doodle.pdf
    • http://www.gorillawalker.com/iphigenia-in-aulis-overture-study-score.pdf
    • http://www.gorillawalker.com/project-management-for-the-creation-of-organisational-value.pdf
    • http://www.gorillawalker.com/septoria-on-cereals-a-study-of-pathosystems.pdf
    • http://www.gorillawalker.com/off-the-king-s-road-lost-and-found-in-london.pdf
    • http://www.gorillawalker.com/die-koalitionsfreiheit-des-arbeitnehmers-the-freedom-of-the-worker-to.pdf
    • http://www.gorillawalker.com/lead-us-unto-life-faure-satb-org-sheet-music.pdf
    • http://www.gorillawalker.com/a-miracle-of-healing.pdf
    • http://www.gorillawalker.com/broken-bones-the-x-ray-atlas-of-fractures.pdf
    • http://www.gorillawalker.com/ernest-hemingway-a-to-z-the-essential-reference-to-the.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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