Malicious PDF — malware analysis report

Static analysis result for SHA-256 b84b71fea70dad5c…

MALICIOUS

PDF

46.1 KB Created: 2018-11-30 20:09:04 +03:00 Authoring application: Windows PSCRIPT (via Acrobat Distiller 3.01 for Windows)
MD5: e814dc5ce965db3130bd520cc77777a7 SHA-1: 12099ca9713ba7a1812c9bf86b3cd16cd0ef9c39 SHA-256: b84b71fea70dad5cef9f73fded6361488bfd4c0a19c74c0f0823b3014ee3ae57
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to external PDF files, as indicated by the PDF_SEO_LINK_FARM heuristic. This suggests a tactic to manipulate search engine results or to distribute a large volume of content, potentially malicious. The ML classifier also flagged the document as malicious. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8439

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/a-history-of-the-development-of-the-united-states-gymnastics.pdf
    • http://www.gorillawalker.com/campground-management-how-to-establish-and-operate-your-campground.pdf
    • http://www.gorillawalker.com/cengagenow-1-term-6-months-printed-access-card-for-mowen.pdf
    • http://www.gorillawalker.com/appeasing-fascism.pdf
    • http://www.gorillawalker.com/how-well-do-you-know-your-bible-over-500-questions.pdf
    • http://www.gorillawalker.com/exploring-oregon-s-wild-areas-a-guide-for-hikers-backpackers.pdf
    • http://www.gorillawalker.com/annual-review-of-nursing-research-volume-5-1987-focus-on.pdf
    • http://www.gorillawalker.com/ikebana-spirit-and-technique.pdf
    • http://www.gorillawalker.com/la-favorita-vocal-score.pdf
    • http://www.gorillawalker.com/la-metaura-d-aristotile-volgarizzamento-fiorentino-anonimo-del-xiv-secolo.pdf
    • http://www.gorillawalker.com/manual-of-chess-combinations-vol-1a.pdf
    • http://www.gorillawalker.com/fodor-s-los-angeles-2002-the-guide-for-all-budgets.pdf
    • http://www.gorillawalker.com/sakhalin-island-alma-classics.pdf
    • http://www.gorillawalker.com/woodall-s-western-america-campground-directory-2008-woodall-s-campground.pdf
    • http://www.gorillawalker.com/the-my-little-pony-2009-2012-collector-s-inventory.pdf
    • http://www.gorillawalker.com/can-t-stop-won-t-stop-a-history-of-the.pdf
    • http://www.gorillawalker.com/i-married-a-soldier.pdf
    • http://www.gorillawalker.com/para-states-and-medical-science-making-african-global-health-critical.pdf
    • http://www.gorillawalker.com/integrated-continuous-time-filters-principles-design-and-applications-pc0321-0.pdf
    • http://www.gorillawalker.com/woman-s-day-healthy-slow-cooking-more-flavor-fewer-calories.pdf
    • http://www.gorillawalker.com/manners-that-matter.pdf
    • http://www.gorillawalker.com/die-berschrift-sachzw-nge-fallstricke-versuchungen-rezepte-journalistische-praxis-german.pdf
    • http://www.gorillawalker.com/wolves-2015.pdf
    • http://www.gorillawalker.com/introduction-to-linear-systems-of-differential-equations-translations-of-mathematical.pdf
    • http://www.gorillawalker.com/a-second-back-cross-test-for-determiners-of-spontaneous-leukemia.pdf
    • http://www.gorillawalker.com/a-year-in-the-middle-east-expeditions-in-iran-and.pdf
    • http://www.gorillawalker.com/stress-management-a-manual-for-nurses.pdf
    • http://www.gorillawalker.com/introduction-to-environmental-soil-physics.pdf
    • http://www.gorillawalker.com/ethical-decision-making-in-clinical-neuropsychology-american-academy-of-clinical.pdf
    • http://www.gorillawalker.com/plan-atlas-apartment-buildings.pdf
    • http://www.gorillawalker.com/the-detective-novels-of-agatha-christie-a-reader-s-guide.pdf
    • http://www.gorillawalker.com/the-boer-war-1899-1902-ladysmith-magersfontein-spion-kop-kimberley.pdf
    • http://www.gorillawalker.com/health-care-quality-management-tools-and-applications.pdf
    • http://www.gorillawalker.com/the-harris-hondbook-on-basic-telephony.pdf
    • http://www.gorillawalker.com/steven-smale-the-mathematician-who-broke-the-dimension-barrier.pdf
    • http://www.gorillawalker.com/future-groundwater-resources-at-risk-proceedings-of-an-international-conference.pdf
    • http://www.gorillawalker.com/option-trading-the-ultimate-option-trading-strategies-only-the-wealthy.pdf
    • http://www.gorillawalker.com/rolling-stones-complete-recording-sessions-1963-1989.pdf
    • http://www.gorillawalker.com/muskrat-ramble-sheet-music.pdf
    • http://www.gorillawalker.com/entrepreneurship-new-venture-creation.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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