Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b7ff905cb92b2e1…

MALICIOUS

PDF

40.7 KB Created: 2018-12-15 08:29:36 +03:00 Authoring application: Acrobat PDFMaker 11 for Word (via Adobe PDF Library 11.0)
MD5: 368c6391ba722562c1c27d1b7e6e25a0 SHA-1: 0920907ae33cbd66d8a568499221337c8e894d16 SHA-256: 9b7ff905cb92b2e19972fde3e0709319802a2997f910b86b1d04012d020ecb22
90 Risk Score

Malware Insights

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

The PDF was flagged by a critical heuristic for containing a large number of external links, specifically pointing to PDF files on the domain www.gorillawalker.com. The ML classifier also strongly indicated maliciousness. The document body contains obfuscated content and embedded URLs, suggesting an attempt to disguise the malicious intent. The primary attack pattern appears to be a link farm designed to manipulate search engine results or distribute further malicious content via the linked PDFs.

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/the-goodbye-body-a-claire-malloy-mystery-claire-malloy-mysteries.pdf
    • http://www.gorillawalker.com/dharma-and-dhamma-an-overview-of-dharma-and-dhamma-and.pdf
    • http://www.gorillawalker.com/bound-feet-and-western-dress-a-memoir-abridged-audible-audio.pdf
    • http://www.gorillawalker.com/elementary-linear-algebra-text-with-student-cd.pdf
    • http://www.gorillawalker.com/corporate-value-of-enterprise-risk-management-the-next-step-in.pdf
    • http://www.gorillawalker.com/warehouse-management-and-material-control-management-of-procurement-of-raw.pdf
    • http://www.gorillawalker.com/taking-the-heat-selected-sinners-mc-romance-book-2-kindle.pdf
    • http://www.gorillawalker.com/risk-of-skin-cancer-can-t-be-assessed-based-solely.pdf
    • http://www.gorillawalker.com/environmental-and-ecology-law-text-and-materials-law-in-context.pdf
    • http://www.gorillawalker.com/games-children-sing-japan-book-cd.pdf
    • http://www.gorillawalker.com/the-teleological-ethics-of-fakhr-al-din-al-razi-islamic.pdf
    • http://www.gorillawalker.com/introductory-econometrics-with-applications-the-dryden-press-series-in-economics.pdf
    • http://www.gorillawalker.com/who-comes-after-the-subject.pdf
    • http://www.gorillawalker.com/the-ocean-of-story-being-c-h-tawney-s-translation.pdf
    • http://www.gorillawalker.com/this-is-my-god.pdf
    • http://www.gorillawalker.com/earth-science-teacher-s-edition.pdf
    • http://www.gorillawalker.com/national-geographic-readers-robots.pdf
    • http://www.gorillawalker.com/to-do-and-to-be-portraits-of-four-women-activists.pdf
    • http://www.gorillawalker.com/a-firefly-in-a-fir-tree-a-carol-for-mice.pdf
    • http://www.gorillawalker.com/one-bite-with-a-stranger-the-others-book-1.pdf
    • http://www.gorillawalker.com/care-of-people-with-diabetes-a-manual-of-nursing-practice.pdf
    • http://www.gorillawalker.com/driving-force-unabridged-audible-audio-edition.pdf
    • http://www.gorillawalker.com/hanon-the-virtuoso-pianist-in-60-exercises-complete-alfred-masterworks.pdf
    • http://www.gorillawalker.com/sparkle-considers-children-in-art.pdf
    • http://www.gorillawalker.com/the-perkins-maid.pdf
    • http://www.gorillawalker.com/brethren-raised-by-wolves.pdf
    • http://www.gorillawalker.com/tintin-in-america-adventures-of-tintin.pdf
    • http://www.gorillawalker.com/veterinary-ectoparasites-biology-pathology-and-control.pdf
    • http://www.gorillawalker.com/auto-engines-technology-workbook.pdf
    • http://www.gorillawalker.com/constraints-on-numerical-expressions-oxford-surveys-in-semantics-and-pragmatics.pdf
    • http://www.gorillawalker.com/the-coming-war-with-japan.pdf
    • http://www.gorillawalker.com/a-man-of-the-people.pdf
    • http://www.gorillawalker.com/mirroring-people-the-new-science-of-how-we-connect-with.pdf
    • http://www.gorillawalker.com/churches-incorporated-looking-behind-the-cross-looking-beyond-the-cross.pdf
    • http://www.gorillawalker.com/the-supermarket-companion.pdf
    • http://www.gorillawalker.com/basic-english-grammar-student-text.pdf
    • http://www.gorillawalker.com/angelcake-plays-with-attitude.pdf
    • http://www.gorillawalker.com/violence-school-of-american-research-advanced-seminar.pdf
    • http://www.gorillawalker.com/franchises-you-can-run-from-home.pdf
    • http://www.gorillawalker.com/the-prodigal-god-discussion-guide-with-dvd-finding-your-place.pdf
    • http://www.gorillawalker.com/warehouse-management-and-m
    • 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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