Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2ada58a2f584ebe…

MALICIOUS

PDF

43.3 KB Created: 2018-12-15 20:02:26 +03:00 Authoring application: - (via Acrobat Distiller 5.0 (Windows)) First seen: 2019-03-10
MD5: 5d3f0a365c306a3c7647037805ab2421 SHA-1: 32d0e69027620b5426aa7fcbbc5e1d1881e03b65 SHA-256: a2ada58a2f584ebe4a4037ccf5c4413f94a77442dd17109fe66f62721b04c675
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded URLs pointing to external PDF files, as indicated by the PDF_SEO_LINK_FARM heuristic. While no specific malicious script was directly observed in the DOC BODY, the presence of an embedded JavaScript stream and the sheer volume of external links suggest an attempt to manipulate search engine results or distribute potentially malicious content. The ML classifier also flagged the document as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8224

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/philosophy-of-punk-more-than-noise-russian-edition.pdf In PDF document text
    • http://www.gorillawalker.com/iguanodon-discovering-dinosaurs.pdfIn PDF document text
    • http://www.gorillawalker.com/complete-guide-to-healthy-living-osteoporosis-chinese-edition.pdfIn PDF document text
    • http://www.gorillawalker.com/a-birthday-basket-for-tia-aladdin-picture-books.pdfIn PDF document text
    • http://www.gorillawalker.com/insomnia-sleep-apnea-narcolepsy.pdfIn PDF document text
    • http://www.gorillawalker.com/racism-in-maya-angelou-s-i-know-why-the-caged.pdfIn PDF document text
    • http://www.gorillawalker.com/wall-street-journal-guide-to-the-top-business-schools-2004.pdfIn PDF document text
    • http://www.gorillawalker.com/socrates-a-life-examined.pdfIn PDF document text
    • http://www.gorillawalker.com/the-little-web-cam-book.pdfIn PDF document text
    • http://www.gorillawalker.com/speed-reading-for-entrepreneurs-seven-speed-reading-tactics-to-read.pdfIn PDF document text
    • http://www.gorillawalker.com/why-didn-t-i-think-of-that-bizarre-origins-of.pdfIn PDF document text
    • http://www.gorillawalker.com/laboratory-diagnosis-of-viral-respiratory-disease-cumitech-ser.pdfIn PDF document text
    • http://www.gorillawalker.com/sword-art-online-6-phantom-bullet.pdfIn PDF document text
    • http://www.gorillawalker.com/avoiding-option-trading-traps.pdfIn PDF document text
    • http://www.gorillawalker.com/platform-get-noticed-in-a-noisy-world-by-michael-hyatt.pdfIn PDF document text
    • http://www.gorillawalker.com/fish-and-fish-products-report.pdfIn PDF document text
    • http://www.gorillawalker.com/left-to-my-own-devices-learner-autonomy-and-mobile-assisted.pdfIn PDF document text
    • http://www.gorillawalker.com/principles-of-forest-hydrology.pdfIn PDF document text
    • http://www.gorillawalker.com/the-complete-guide-to-golf-on-cape-cod-nantucket-and.pdfIn PDF document text
    • http://www.gorillawalker.com/roads-to-freedom-socialism-anarchism-syndication.pdfIn PDF document text
    • http://www.gorillawalker.com/le-livre-des-esprits-contenant-les-principes-de-la-doctrine.pdfIn PDF document text
    • http://www.gorillawalker.com/taylor-coursepoint-8e-plus-lww-docucare-three-year-access-package.pdfIn PDF document text
    • http://www.gorillawalker.com/child-abuse.pdfIn PDF document text
    • http://www.gorillawalker.com/yachtsman-s-guide-to-the-bahamas-1992.pdfIn PDF document text
    • http://www.gorillawalker.com/baby-turtles.pdfIn PDF document text
    • http://www.gorillawalker.com/algebra-the-university-of-chicago-school-mathematics-project.pdfIn PDF document text
    • http://www.gorillawalker.com/a-view-of-the-constitution-of-the-church-of-scotland.pdfIn PDF document text
    • http://www.gorillawalker.com/the-retinal-pigment-epithelium.pdfIn PDF document text
    • http://www.gorillawalker.com/tabbed-board-books-my-first-words-let-s-get-talking.pdfIn PDF document text
    • http://www.gorillawalker.com/gemba-kaizen-a-commonsense-approach-to-a-continuous-improvement-strategy.pdfIn PDF document text
    • http://www.gorillawalker.com/jobs-for-the-boys-an-essential-career-choice-guide-for.pdfIn PDF document text
    • http://www.gorillawalker.com/the-art-of-ballpoint-experimentation-exploration-and-techniques-in-ink.pdfIn PDF document text
    • http://www.gorillawalker.com/keep-calm-and-let-the-administrative-assistant-handle-it-be.pdfIn PDF document text
    • http://www.gorillawalker.com/rand-mcnally-winston-salem-forsyth-county-local-north-carolina-rand.pdfIn PDF document text
    • http://www.gorillawalker.com/the-upside-of-love-unabridged-audible-audio-edition.pdfIn PDF document text
    • http://www.gorillawalker.com/washington-s-war-on-nicaragua.pdfIn PDF document text
    • http://www.gorillawalker.com/national-identity-and-its-defenders-thailand-today.pdfIn PDF document text
    • http://www.gorillawalker.com/passporter-s-walt-disney-world-2012-deluxe-the-unique-travel.pdfIn PDF document text
    • http://www.gorillawalker.com/fitness-nutrition-special-dietary-needs.pdfIn PDF document text
    • http://www.gorillawalker.com/claiming-his-little-princess-a-fertile-first-time-with-the.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://www.aiim.org/pdfa/ns/extension/In PDF document text
    • http://www.aiim.org/pdfa/ns/schema#In PDF document text
    • http://www.aiim.org/pdfa/ns/property#In PDF document text
    • http://www.aiim.org/pdfa/ns/id/In PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_001_off00000c99.js decompressed-pdf-stream PDF FlateDecoded stream at offset 0xC99 16609 bytes
SHA-256: 800d58eb658037e155df21d13f28c9acb20e4371f78bf1a76957ea5d313bcf5d

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