Malicious PDF — malware analysis report

Static analysis result for SHA-256 99a1cbf13dc40829…

MALICIOUS

PDF

44.7 KB Created: 2018-11-30 20:05:17 +03:00 Authoring application: Microsoft Word (via Acrobat PDFWriter 3.0f1r8 for Power Macintosh)
MD5: 0e36bc99d5f26cdf7d65ce22cbbdbdcb SHA-1: abf26f5c563761f339d6dd068878e621a1b5d43f SHA-256: 99a1cbf13dc40829de81a4154bb72ec7d8c19a23c3e4ac1ca0bad190c46c91d6
90 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to external websites, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged this PDF as malicious with high confidence. While no scripts were extracted, the sheer volume of links suggests an attempt to manipulate search engine results or redirect users to potentially malicious content hosted on the linked domains.

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/practical-psychiatric-epidemiology-oxford-medical-publications.pdf
    • http://www.gorillawalker.com/galapagos-2013-square-12x12-wall-calendar.pdf
    • http://www.gorillawalker.com/the-life-and-revelations-of-anne-catherine-emmerich-2-volume.pdf
    • http://www.gorillawalker.com/network-security-through-data-analysis-building-situational-awareness.pdf
    • http://www.gorillawalker.com/eres-m-o-ser-s-m-o-para-siempre-n.pdf
    • http://www.gorillawalker.com/hermes-lyre-italian-poetic-self-commentary-from-dante-to-tommaso.pdf
    • http://www.gorillawalker.com/lifepac-science-10th-grade.pdf
    • http://www.gorillawalker.com/borrowing-heather-s-body-the-trilogy-body-swap-erotica.pdf
    • http://www.gorillawalker.com/dreaming-in-hindi-life-in-translation.pdf
    • http://www.gorillawalker.com/principios-de-histolog.pdf
    • http://www.gorillawalker.com/ib-physics-print-and-online-course-book-pack-2014-edition.pdf
    • http://www.gorillawalker.com/the-maudsley-prescribing-guidelines-in-psychiatry-by-david-taylor-mar.pdf
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    • http://www.gorillawalker.com/land-rover-discovery-diesel-service-and-repair-manual-haynes-service.pdf
    • http://www.gorillawalker.com/the-andes-mountains-around-the-world.pdf
    • http://www.gorillawalker.com/good-mushrooms-and-bad-toadstools-rookie-read-about-science.pdf
    • http://www.gorillawalker.com/a-journey-into-gravity-and-spacetime-scientific-american-library.pdf
    • http://www.gorillawalker.com/the-distressing-damsel-book-2-of-the-dragon-kin.pdf
    • http://www.gorillawalker.com/how-to-import-from-china-a-practical-guide-asian-business.pdf
    • http://www.gorillawalker.com/case-studies-in-biometry.pdf
    • http://www.gorillawalker.com/the-arrivants-a-new-world-trilogy-rights-of-passage-islands.pdf
    • http://www.gorillawalker.com/three-weeks-with-a-bull-rider-an-oklahoma-nights-romance.pdf
    • http://www.gorillawalker.com/the-melting-pot-drama-in-four-acts.pdf
    • http://www.gorillawalker.com/to-freedom-born-the-r-c-lewter-jr-m-d.pdf
    • http://www.gorillawalker.com/nuclear-energy-facility-siting-and-waste-storage-public-attitudes-and.pdf
    • http://www.gorillawalker.com/plan-general-de-contabilidad-adgd0308-spanish-edition-kindle-edition.pdf
    • http://www.gorillawalker.com/emerging-butterfly-finding-life-beyond-anxiety-disorders.pdf
    • http://www.gorillawalker.com/the-less-than-perfect-rider-overcoming-common-riding-problems.pdf
    • http://www.gorillawalker.com/showdown-at-widow-creek-hardy-boys-adventures.pdf
    • http://www.gorillawalker.com/el-padrino-punto-de-lectura-spanish-edition.pdf
    • http://www.gorillawalker.com/philip-s-red-books-dorset-and-the-channel-isles-leisure.pdf
    • http://www.gorillawalker.com/cross-cultural-connections-in-crime-fictions.pdf
    • http://www.gorillawalker.com/naughty-norton-pony-tales.pdf
    • http://www.gorillawalker.com/discovering-indigenous-lands-the-doctrine-of-discovery-in-the-english.pdf
    • http://www.gorillawalker.com/kicsi-vagyok-philipp-winterberg-s-nadja-wichmann-k-pes-mes.pdf
    • http://www.gorillawalker.com/the-sources-of-christian-ethics-3rd-edition.pdf
    • http://www.gorillawalker.com/lonely-planet-africa-phrasebook-dictionary-lonely-planet-phrasebooks.pdf
    • http://www.gorillawalker.com/lifepac
    • 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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