Malicious PDF — malware analysis report

Static analysis result for SHA-256 a98628bac229bb93…

MALICIOUS

PDF

42.4 KB Created: 2019-04-05 12:24:54 +03:00 Authoring application: Writer (via OpenOffice.org 1.1.2)
MD5: af8fbdb3b883097e414976c5dc4565ab SHA-1: b7de6e4802e80e4f8abcd22b99cfe6812ae6f639 SHA-256: a98628bac229bb93ab16a7a650838b28dadb38a5600fe1d318a230712c4c76f1
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged the document as malicious with high confidence. The embedded URLs point to various book-related PDFs on the same domain, suggesting a link farm or content redirection strategy. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the specific lure.

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/cooking-for-one-365-days-of-easy-recipes-for-one.pdf
    • http://www.gorillawalker.com/money-matters-stepping-stones-business-tips-stepping-stones-series-kindle.pdf
    • http://www.gorillawalker.com/92-casserole-recipes-cookbook-best-casseroles-dishes-recipes-from-easy.pdf
    • http://www.gorillawalker.com/warren-buffett-accounting-book-reading-financial-statements-for-value-investing.pdf
    • http://www.gorillawalker.com/aerocrafter-homebuilt-aircraft-source-book.pdf
    • http://www.gorillawalker.com/neptuno-alegorico-allegorical-neptune-letras-hispanicas-hispanic-writings-spanish-edition.pdf
    • http://www.gorillawalker.com/complex-home-care-part-ii-family-annual-income-insurance-premium.pdf
    • http://www.gorillawalker.com/death-among-the-roses-a-melanie-hart-mystery-melanie-hart.pdf
    • http://www.gorillawalker.com/common-law-marriage-issues-the-law-an-article-from-risk.pdf
    • http://www.gorillawalker.com/the-wholeness-of-nature-goethe-s-way-toward-a-science.pdf
    • http://www.gorillawalker.com/christian-instruction-admonition-and-grace-the-christian-combat-faith-hope.pdf
    • http://www.gorillawalker.com/the-single-woman-s-guide-to-real-estate-all-you.pdf
    • http://www.gorillawalker.com/group-work-skills-and-strategies-for-effective-interventions.pdf
    • http://www.gorillawalker.com/dk-eyewitness-travel-guide-japan.pdf
    • http://www.gorillawalker.com/jose-raul-capablanca-third-world-chess-champion-chesscafe-world-chess.pdf
    • http://www.gorillawalker.com/nissa-s-place.pdf
    • http://www.gorillawalker.com/hospice-aide-on-the-go-in-services-series-volume-2.pdf
    • http://www.gorillawalker.com/american-methodist-worship-religion-in-america.pdf
    • http://www.gorillawalker.com/great-society-to-the-reagan-era-history-of-multicultural-america.pdf
    • http://www.gorillawalker.com/cerebral-arterial-disease.pdf
    • http://www.gorillawalker.com/arisa-2.pdf
    • http://www.gorillawalker.com/le-morte-darthur-v2.pdf
    • http://www.gorillawalker.com/kata-bunkai-the-secret-karate-techniques.pdf
    • http://www.gorillawalker.com/the-art-of-star-wars-classic-characters-1998-calendar.pdf
    • http://www.gorillawalker.com/cruiser-management-helmsman-guides.pdf
    • http://www.gorillawalker.com/warrior-by-choice-by-chance.pdf
    • http://www.gorillawalker.com/exploring-the-sea-random-house-library-of-knowledge.pdf
    • http://www.gorillawalker.com/memento-de-soins-hospitaliers-pediatriques-prise-en-charge-des-affections.pdf
    • http://www.gorillawalker.com/occupational-stress-a-handbook-series-in-health-psychology-and-behavioral.pdf
    • http://www.gorillawalker.com/mohandas-gandhi-time-for-kids-nonfiction-readers-level-3-9.pdf
    • http://www.gorillawalker.com/the-fault-in-our-stars-unabridged-audible-audio-edition.pdf
    • http://www.gorillawalker.com/super-minds-american-english-level-1-online-resources.pdf
    • http://www.gorillawalker.com/reinforced-and-prestressed-concrete-design-to-ec2-the-complete-process.pdf
    • http://www.gorillawalker.com/becoming-his-ghetto-bimbo-controlled-by-him.pdf
    • http://www.gorillawalker.com/crossing-the-ditch.pdf
    • http://www.gorillawalker.com/mini-weapons-of-mass-destruction-2-build-a-secret-agent.pdf
    • http://www.gorillawalker.com/floral-party-table-decorations.pdf
    • http://www.gorillawalker.com/street-atlas-glasgow.pdf
    • http://www.gorillawalker.com/paintshop-pro-x4-for-photographers.pdf
    • http://www.gorillawalker.com/healthcare-information-security-and-privacy.pdf
    • http://www.gorillawalker.com/warren-
    • 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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