Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f4265c6b233de49…

MALICIOUS

PDF

33.3 KB Created: 2019-05-24 00:42:42 +03:00 Authoring application: LaTeX with hyperref package (via pdfTeX-1.40.9)
MD5: 6298860247aa758d2fdaabf2563942fc SHA-1: 6b551bf482299caa97870ba38801ede0b93ace8e SHA-256: 7f4265c6b233de49bdf5c946b3b7518a22198f370776e3d2f637e049304067dc
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for a 'PDF_SEO_LINK_FARM', indicating a large number of embedded external links. The ML classifier also flagged the PDF as malicious. While no scripts were extracted, the sheer volume of links to various PDF documents suggests an attempt to manipulate search engine results or distribute content, potentially malicious, through a link farm. The primary attack pattern observed is the use of a PDF as an attachment in a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8529

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/the-application-of-the-rule-of-exhaustion-of-local-remedies.pdf
    • http://www.gorillawalker.com/organization-theory-from-chester-barnard-to-the-present-and-beyond.pdf
    • http://www.gorillawalker.com/discovering-the-riches-of-the-word-religious-reading-in-late.pdf
    • http://www.gorillawalker.com/starting-out-in-futures-trading.pdf
    • http://www.gorillawalker.com/marley-s-diary-a-spiritual-look-at-life-from-a.pdf
    • http://www.gorillawalker.com/cultureshock-australia.pdf
    • http://www.gorillawalker.com/anatomia-del-alma-spanish-edition.pdf
    • http://www.gorillawalker.com/la-cucaracha-martina-un-cuento-folklorico-del-caribe-spanish-language.pdf
    • http://www.gorillawalker.com/inside-the-mouse-work-and-play-at-disney-world-post.pdf
    • http://www.gorillawalker.com/orchids-for-dummies.pdf
    • http://www.gorillawalker.com/the-story-of-fergie-bey-awaraquay-told-by-himself-and.pdf
    • http://www.gorillawalker.com/basketball-gods-the-transformation-of-the-enlightened-jock.pdf
    • http://www.gorillawalker.com/guide-to-buying-riding-a-longboard-kindle-edition.pdf
    • http://www.gorillawalker.com/a-new-kind-of-magic.pdf
    • http://www.gorillawalker.com/gunsmith-cats-revised-edition-volume-4-gunsmith-cats-dark-horse.pdf
    • http://www.gorillawalker.com/introduction-to-the-theory-of-sets-dover-books-on-mathematics.pdf
    • http://www.gorillawalker.com/doing-a-literature-review-releasing-the-social-science-research-imagination.pdf
    • http://www.gorillawalker.com/compendio-de-medicina-interna-spanish-edition-kindle-edition.pdf
    • http://www.gorillawalker.com/all-i-ask-of-you-from-the-phantom-of-the.pdf
    • http://www.gorillawalker.com/the-tibetan-book-of-the-great-liberation.pdf
    • http://www.gorillawalker.com/the-practice-and-science-of-drawing-of-speed-harold-on.pdf
    • http://www.gorillawalker.com/adam-smith-als-rechtstheoretiker-german-edition.pdf
    • http://www.gorillawalker.com/introduction-to-the-design-of-transconductor-capacitor-filters-the-springer.pdf
    • http://www.gorillawalker.com/bob-marley-songs-of-freedom-piano-voiceguitar.pdf
    • http://www.gorillawalker.com/sources-and-control-of-air-pollution.pdf
    • http://www.gorillawalker.com/polyurethane-sealants-technology-applications.pdf
    • http://www.gorillawalker.com/juicing-juicing-recipes-for-weight-loss-400-detox-cleanse-and.pdf
    • http://www.gorillawalker.com/america-in-vietnam-a-documentary-history.pdf
    • http://www.gorillawalker.com/reading-comprehension-grade-4-master-skills.pdf
    • http://www.gorillawalker.com/law-society-of-ireland-manual-landlord-and-tenant-law.pdf
    • http://www.gorillawalker.com/citizenship-and-the-nation-state-in-greece-and-turkey.pdf
    • http://www.gorillawalker.com/the-essential-charles-darwin-collection-illustrated-kindle-edition.pdf
    • http://www.gorillawalker.com/what-if-i-had-been-the-hero-investigating-women-s.pdf
    • http://www.gorillawalker.com/the-military-history-of-wisconsin-a-record-of-the-civil.pdf
    • http://www.gorillawalker.com/banff-macduff-and-turriff-explorer-maps.pdf
    • http://www.gorillawalker.com/barbados-adventure-guide-adventure-guides-kindle-edition.pdf
    • http://www.gorillawalker.com/caroline-myss-essential-guide-for-healers.pdf
    • http://www.gorillawalker.com/chinese-foreign-policy-in-an-age-of-transition-the-diplomacy.pdf
    • http://www.gorillawalker.com/essays-in-zen-buddhism-third-series.pdf
    • http://www.gorillawalker.com/ecclesiastes-song-of-solomon-thru-the-bible.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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