Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d86574f385ae7b3…

MALICIOUS

PDF

43.0 KB Created: 2018-12-14 21:28:39 +03:00 Authoring application: Adobe InDesign CS5 (7.0.3) (via Adobe PDF Library 9.9)
MD5: 018c9ae838cd118f8d5e4cb59f36f248 SHA-1: b8697add42ede482c269122a3b1b7d18eb92be7a SHA-256: 1d86574f385ae7b3dbc08ee115f7822fe2f92d153187fdf5f83e46ec2c18675b
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains a large number of embedded external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged this PDF as malicious with a high probability. The document body appears to be malformed or truncated, but the presence of numerous links to external PDF files suggests a link farm or distribution mechanism. The exact intent is unclear due to the lack of executable scripts, but the structure strongly suggests malicious intent, possibly for SEO manipulation or to serve as a landing page for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9181

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/fire-trucks-machines-at-work.pdf
    • http://www.gorillawalker.com/red-dog.pdf
    • http://www.gorillawalker.com/the-sabbath-journal-of-judith-lomax-aar-texts-and-translations.pdf
    • http://www.gorillawalker.com/for-the-love-of-a-marine.pdf
    • http://www.gorillawalker.com/the-medieval-christian-philosophers-an-introduction.pdf
    • http://www.gorillawalker.com/emily-bront-wuthering-heights-analysing-texts.pdf
    • http://www.gorillawalker.com/bridges-design-for-improved-buildability-ciria-publication.pdf
    • http://www.gorillawalker.com/dental-supreme-solved-question-papers-of-pedodontics-and-preventive-dentistry.pdf
    • http://www.gorillawalker.com/capital-and-interest-the-collected-works-of-f-a-hayek.pdf
    • http://www.gorillawalker.com/dictionary-of-english-word-roots-english-roots-and-roots-english.pdf
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    • http://www.gorillawalker.com/zasavje-a-z-prirocnik-za-popotnika-in-poslovnega-cloveka-slovenija.pdf
    • http://www.gorillawalker.com/justified-by-faith-alone.pdf
    • http://www.gorillawalker.com/mythic-2.pdf
    • http://www.gorillawalker.com/wie-der-tiger-zahlen-lernt-german-edition.pdf
    • http://www.gorillawalker.com/the-future-of-the-icecream-market-in-spain-to-2016.pdf
    • http://www.gorillawalker.com/the-presbyterian-way-of-life.pdf
    • http://www.gorillawalker.com/moby-dickhead-or-the-white-zombie-whale-he-s-a.pdf
    • http://www.gorillawalker.com/the-constitutionalization-of-european-private-law-xxii-2-collected-courses.pdf
    • http://www.gorillawalker.com/great-women-of-pioneer-america-we-the-people-expansion-and.pdf
    • http://www.gorillawalker.com/freedom-from-headache.pdf
    • http://www.gorillawalker.com/manual-of-laboratory-and-diagnostic-tests-for-pda-powered-by.pdf
    • http://www.gorillawalker.com/the-fishes-life-nature-library.pdf
    • http://www.gorillawalker.com/animator-the-coolest-jobs-on-the-planet.pdf
    • http://www.gorillawalker.com/limnology-of-paradise-lake-june-october-1979.pdf
    • http://www.gorillawalker.com/hyperbolic-partial-differential-equations-universitext.pdf
    • http://www.gorillawalker.com/meshfree-methods-for-partial-differential-equations-vi-lecture-notes-in.pdf
    • http://www.gorillawalker.com/high-yield-internal-medicine-board-exam-pearls.pdf
    • http://www.gorillawalker.com/textbook-of-pathology-with-pathology-quick-review-and-mcqs-6.pdf
    • http://www.gorillawalker.com/upskilling-ed-clinical-nurse-specialists-the-employment-and-training-off.pdf
    • http://www.gorillawalker.com/children-a-pictorial-archive-from-nineteenth-century-sources-240-copyright.pdf
    • http://www.gorillawalker.com/mastering-intensive-short-term-dynamic-psychotherapy-a-roadmap-to-the.pdf
    • http://www.gorillawalker.com/california-whitewater-a-guide-to-the-rivers.pdf
    • http://www.gorillawalker.com/girls-and-boys-in-school-together-or-separate.pdf
    • http://www.gorillawalker.com/poetic-meter-and-poetic-form.pdf
    • http://www.gorillawalker.com/edinburgh-streetfinder-colour-street-atlas.pdf
    • http://www.gorillawalker.com/remember-how-i-told-you-i-loved-you.pdf
    • http://www.gorillawalker.com/the-case-files-of-the-oriental-sleuths-charlie-chan-mr.pdf
    • http://www.gorillawalker.com/fruit-cocktail-dessert-recipes-kindle-edition.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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