Malicious PDF — malware analysis report

Static analysis result for SHA-256 19cffa6448017590…

MALICIOUS

PDF

42.9 KB Created: 2018-11-15 18:31:32 +03:00 Authoring application: - (via Acrobat Distiller 7.0 (Windows))
MD5: 5432bf005606a315cff06b121bce7170 SHA-1: 15e9dabb8521a5c2a41779458e915a3b67a7893f SHA-256: 19cffa64480175906a4f4a100baac0598f6875641f2ba888034a084855496f3a
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to other PDF files on the same domain. This behavior is indicative of a link farm, often used for SEO manipulation or to distribute malicious content. The ML classifier also flagged this PDF as malicious. 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 0.8573

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/nclex-pn-q-a-plus-revised-reprint-nclex-pn-questions.pdf
    • http://www.gorillawalker.com/riot-on-sunset-strip-rock-n-roll-s-last-stand.pdf
    • http://www.gorillawalker.com/the-year-s-best-science-fiction-thirty-second-annual-collection.pdf
    • http://www.gorillawalker.com/majesty-of-natchez-notecards-the-majesty-series.pdf
    • http://www.gorillawalker.com/cuentos-reunidos-biblioteca-clarice-lispector-spanish-edition.pdf
    • http://www.gorillawalker.com/olympic-politics-athens-to-atlanta-1896-1996.pdf
    • http://www.gorillawalker.com/audio-production-worktext-concepts-techniques-and-equipment.pdf
    • http://www.gorillawalker.com/what-can-we-do-about-oil-spills-and-ocean-pollution.pdf
    • http://www.gorillawalker.com/nature-s-blessing-28-month-planner.pdf
    • http://www.gorillawalker.com/selected-duets-for-french-horn-volume-2-advanced-rubank-educational.pdf
    • http://www.gorillawalker.com/a-course-in-modern-linguistics.pdf
    • http://www.gorillawalker.com/yosemite-and-its-innkeepers.pdf
    • http://www.gorillawalker.com/science-in-100-key-breakthroughs.pdf
    • http://www.gorillawalker.com/forex-trading-an-introduction-to-technical-analysis-chart-patterns.pdf
    • http://www.gorillawalker.com/translating-chinese-classics-in-a-colonial-context-james-legge-and.pdf
    • http://www.gorillawalker.com/ink-create-your-world.pdf
    • http://www.gorillawalker.com/report-of-the-regional-workshop-on-the-monitoring-management-of.pdf
    • http://www.gorillawalker.com/sappho-and-alcaeus-an-introduction-to-the-study-of-ancient.pdf
    • http://www.gorillawalker.com/60-greatest-science-fiction-shows-selected-by-ray-bradbury.pdf
    • http://www.gorillawalker.com/grisly-tales-from-tumblewater.pdf
    • http://www.gorillawalker.com/the-tyrants.pdf
    • http://www.gorillawalker.com/batalla-de-cada-mujer-la-every-woman-s-battle-spanish.pdf
    • http://www.gorillawalker.com/all-must-die.pdf
    • http://www.gorillawalker.com/amalia-spanish-edition.pdf
    • http://www.gorillawalker.com/gonzo-with-the-wind-a-father-and-son-s-seafaring.pdf
    • http://www.gorillawalker.com/the-horse-diseases-and-clinical-management.pdf
    • http://www.gorillawalker.com/state-of-insecurity-government-of-the-precarious-futures.pdf
    • http://www.gorillawalker.com/fund-raising-cost-effectiveness-a-self-assessment-workbook-afp-wiley.pdf
    • http://www.gorillawalker.com/lao-ts.pdf
    • http://www.gorillawalker.com/figures-of-desire-a-theory-and-analysis-of-surrealist-film.pdf
    • http://www.gorillawalker.com/practical-text-analytics-interpreting-text-and-unstructured-data-for-business.pdf
    • http://www.gorillawalker.com/texas-advance-sheet-june-2013-kindle-edition.pdf
    • http://www.gorillawalker.com/taken-for-granted.pdf
    • http://www.gorillawalker.com/oncologia-ginecologica-spanish-edition-kindle-edition.pdf
    • http://www.gorillawalker.com/sibling-interaction-across-cultures-theoretical-and-methodological-issues.pdf
    • http://www.gorillawalker.com/word-searches-grade-3-homework-helper.pdf
    • http://www.gorillawalker.com/winchcombe-and-coventry-chronicles-hitherto-unnoticed-witnesses-to-the-work.pdf
    • http://www.gorillawalker.com/a-history-of-technology-five-volumes.pdf
    • http://www.gorillawalker.com/davis-s-drug-guide-for-nurses-davis-s-drug-guide.pdf
    • http://www.gorillawalker.com/the-writing-process-11th-edition.pdf
    • http://www.gorillawalker.com/olympic-politics-athens-to-atlanta-1896-1
    • 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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