Malicious PDF — malware analysis report

Static analysis result for SHA-256 99a1531c4bc18726…

MALICIOUS

PDF

42.6 KB Created: 2019-03-18 08:27:37 +03:00 Authoring application: DocBook XSL Stylesheets with Apache FOP (via Apache FOP Version 2.1)
MD5: 73a3401d56d17823a86830ebb1359ae8 SHA-1: d3bcc74f110aa575ac21f5c1c53ed073785b053c SHA-256: 99a1531c4bc187263e705b6fc98a3bae435559b1daf0f04b94c80734691ceac2
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment

The PDF contains a large number of embedded links to external PDF files, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged this PDF as malicious. The document body is heavily obfuscated and does not provide clear textual lures, but the sheer volume of links suggests an attempt to drive traffic or distribute further content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9027

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/why-geology-matters-decoding-the-past-anticipating-the-future.pdf
    • http://www.gorillawalker.com/getting-pregnant-staying-pregnant-overcoming-infertility-and-managing-your-high.pdf
    • http://www.gorillawalker.com/incubo-il-giallo-mondadori-italian-edition.pdf
    • http://www.gorillawalker.com/power-piping-the-complete-guide-to-the-asme-b31-1.pdf
    • http://www.gorillawalker.com/the-material-gene-gender-race-and-heredity-after-the-human.pdf
    • http://www.gorillawalker.com/imp-problems.pdf
    • http://www.gorillawalker.com/a-promise-for-miriam-the-pebble-creek-amish-series.pdf
    • http://www.gorillawalker.com/principles-of-modern-soccer.pdf
    • http://www.gorillawalker.com/what-i-wish-my-mother-had-told-me-about-men.pdf
    • http://www.gorillawalker.com/boyd-5e-text-prepu-plus-pillitteri-6e-prepu-package.pdf
    • http://www.gorillawalker.com/goodbye-natalie-goodbye-splendour.pdf
    • http://www.gorillawalker.com/the-acts-of-1-a-collection-of-short-stories.pdf
    • http://www.gorillawalker.com/first-animal-words-first-words.pdf
    • http://www.gorillawalker.com/2011-iron-man-2-wall-calendar.pdf
    • http://www.gorillawalker.com/board-directors-and-corporate-social-responsibility.pdf
    • http://www.gorillawalker.com/he-came-from-galilee.pdf
    • http://www.gorillawalker.com/plx-switched-pci-architecture-enables-speed-expandability-in-new-magma.pdf
    • http://www.gorillawalker.com/question-of-the-day-where-truth-is-the-dare.pdf
    • http://www.gorillawalker.com/laws-of-barbados-volume-3-issue-38.pdf
    • http://www.gorillawalker.com/student-solutions-manual-for-tan-s-applied-calculus-for-the.pdf
    • http://www.gorillawalker.com/jean-auguste-dominique-ingres-160-neoclassical-paintings-neoclassicism-kindle-edition.pdf
    • http://www.gorillawalker.com/archaeological-mexico-a-guide-to-ancient-cities-and-sacred-sites.pdf
    • http://www.gorillawalker.com/total-recovery-breaking-the-cycle-of-chronic-pain-and-depression.pdf
    • http://www.gorillawalker.com/b2-1-1-201-1996-r2007-swps-for-shielded-metalarc.pdf
    • http://www.gorillawalker.com/a-curious-nuisance-flentonsie-kindle-edition.pdf
    • http://www.gorillawalker.com/zagatsurvey-1997-update-hawaii-restaurants-annual.pdf
    • http://www.gorillawalker.com/your-personal-guide-to-motorcycle-wrecks-in-kentucky-and-indiana.pdf
    • http://www.gorillawalker.com/quantitative-logic-and-soft-computing-proceedings-of-the-ql-sc.pdf
    • http://www.gorillawalker.com/the-505-weirdest-online-stores.pdf
    • http://www.gorillawalker.com/women-s-experience-of-modernity-1875-1945.pdf
    • http://www.gorillawalker.com/negotiating-in-a-week.pdf
    • http://www.gorillawalker.com/touchdown-step-into-reading-step-4-paper.pdf
    • http://www.gorillawalker.com/the-pony-rider-boys-in-montana.pdf
    • http://www.gorillawalker.com/hotel-graphics-creative-hotel-identity-designs-in-japan.pdf
    • http://www.gorillawalker.com/promoting-purposeful-discourse-teacher-research-in-mathematics-classrooms.pdf
    • http://www.gorillawalker.com/american-presidential-china-the-robert-l-mcneil-jr-collection-at.pdf
    • http://www.gorillawalker.com/joseph-baby-s-first-bible-04-kindle-edition.pdf
    • http://www.gorillawalker.com/gurps-old-west-op-gurps-generic-universal-role-playing-system.pdf
    • http://www.gorillawalker.com/doom-battlebook-secrets-of-the-games.pdf
    • http://www.gorillawalker.com/shaping-a-christian-worldview-the-foundation-of-christian-higher-education.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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