Malicious PDF — malware analysis report

Static analysis result for SHA-256 756ceceda85faf5c…

MALICIOUS

PDF

43.4 KB Created: 2019-02-14 08:11:34 +03:00 Authoring application: - (via Acrobat PDFWriter 3.02 for Windows NT)
MD5: 4781933805478add6bd5d33ca31a70e8 SHA-1: 409283f83ee9f43c7ed590e7a602b7d5f072aeb7 SHA-256: 756ceceda85faf5c53644700659421527ecf079726161bbdeddd325ebc9852f5
92 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external PDF files, as indicated by the PDF_SEO_LINK_FARM heuristic. While no specific malicious script was detailed, 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 this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9016

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/elihu-root-collection-of-united-states-documents-relating-to-the.pdf
    • http://www.gorillawalker.com/tarot-decoded.pdf
    • http://www.gorillawalker.com/the-catalog-of-union-civil-war-patriotic-covers.pdf
    • http://www.gorillawalker.com/a-journey-of-love.pdf
    • http://www.gorillawalker.com/history-of-philosophy-in-islam.pdf
    • http://www.gorillawalker.com/serenade-for-guitar-with-optional-percussion.pdf
    • http://www.gorillawalker.com/which-trinity-whose-monotheism-philosophical-and-systematic-theologians-on-the.pdf
    • http://www.gorillawalker.com/fairy-gardening-101-how-to-design-plant-grow-and-create.pdf
    • http://www.gorillawalker.com/wto-text-cases.pdf
    • http://www.gorillawalker.com/fundamentals-of-superconductivity-topics-in-language-and-linguistics.pdf
    • http://www.gorillawalker.com/digital-light.pdf
    • http://www.gorillawalker.com/waltzes-and-scherzos-dover-music-for-piano.pdf
    • http://www.gorillawalker.com/thanks-be-to-thee-organ-sheet-music.pdf
    • http://www.gorillawalker.com/cool-trash-to-treasure-creative-ways-to-upcycle-your-trash.pdf
    • http://www.gorillawalker.com/sonata-for-alto-saxophone-and-piano.pdf
    • http://www.gorillawalker.com/mcat-test-prep-physics-review-flashcards-mcat-study-guide-book.pdf
    • http://www.gorillawalker.com/playtoy-for-a-prince-erotic-victorian-romance-based-on-true.pdf
    • http://www.gorillawalker.com/chiropractic-technique-principles-and-procedures-3e-3rd-third-edition-by.pdf
    • http://www.gorillawalker.com/generalized-phase-contrast-applications-in-optics-and-photonics-springer-series.pdf
    • http://www.gorillawalker.com/managing-information-in-the-public-sector.pdf
    • http://www.gorillawalker.com/llewellyn-s-2012-herbal-almanac-a-do-it-yourself-guide.pdf
    • http://www.gorillawalker.com/anne-frank-twentieth-century-history-makers.pdf
    • http://www.gorillawalker.com/ninja-wars-ad-d-forgotten-realms-oriental-adventures-module-froa1.pdf
    • http://www.gorillawalker.com/la-resurrection-de-sherlock-holmes-french-edition-kindle-edition.pdf
    • http://www.gorillawalker.com/frontline-families.pdf
    • http://www.gorillawalker.com/black-decker-complete-guide-to-wiring-6th-edition-current-with.pdf
    • http://www.gorillawalker.com/verilog-hdl-a-guide-to-digital-design-and-synthesis-low.pdf
    • http://www.gorillawalker.com/introductory-r-a-beginner-s-guide-to-data-visualisation-statistical.pdf
    • http://www.gorillawalker.com/industries-careers-for-mbas-edition-wetfeet-insider-guide.pdf
    • http://www.gorillawalker.com/the-thinking-woman-s-guide-to-a-better-birth.pdf
    • http://www.gorillawalker.com/being-here.pdf
    • http://www.gorillawalker.com/current-trends-in-truck-suspensions-s-p-society-of-automotive.pdf
    • http://www.gorillawalker.com/the-top-50-juicing-recipes-healthy-delicious-for-weight-loss.pdf
    • http://www.gorillawalker.com/trajectory-optimization-for-spacecraft-collision-avoidance.pdf
    • http://www.gorillawalker.com/kids-u-s-vacation-crossword-fun-crossword-puzzles-of-all.pdf
    • http://www.gorillawalker.com/cryptography-for-security-and-privacy-in-cloud-computing-information-security.pdf
    • http://www.gorillawalker.com/the-year-book-of-nuclear-medicine-1983.pdf
    • http://www.gorillawalker.com/broken-stick-mission-to-the-forbidden-islands.pdf
    • http://www.gorillawalker.com/stories-of-the-gorilla-country.pdf
    • http://www.gorillawalker.com/possession-a-novel-of-the-fallen-angels.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/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_001_off00000d37.js
35d0a0c8fe58a4b31c16d66620bfd64100a61eceeed0ed5566d5902702b36373		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xD37 16500 bytes

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