Malicious PDF — malware analysis report

Static analysis result for SHA-256 04185ee8d9d1dcf7…

MALICIOUS

PDF

40.9 KB Created: 2020-03-16 17:55:09 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 8fc7cf7613b69c71baeb1bbef4711ecc SHA-1: d6466d1c3aff4537569fc3d8d03590734d049096 SHA-256: 04185ee8d9d1dcf7a80e8f02172461d46e5e4902673aa94a75f201aff5ef57c9
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to numerous PDF files hosted on various domains, suggesting a link farm or SEO manipulation tactic. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the sheer volume of outbound links is highly suspicious and indicative of an attempt to direct users to potentially malicious or spam content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://skinspiritlife.com/uploads/1/3/0/5/130547078/130547078.html#philip+glass+opening+pdf
    • http://www.insideanonlinegame.com/uploads/1/3/0/2/130291575/dujawegesenubux-lolijuf-bagur.pdf
    • http://justintimetoshine.org/uploads/1/3/0/5/130539204/8094589.pdf
    • http://replicationsystems.com/uploads/1/3/0/6/130621533/wepokevifokafifiwawo.pdf
    • http://braunmaguirejewelers.com/uploads/1/3/0/3/130312957/418102544d9e0.pdf
    • http://mail.marketingaz.com/uploads/1/3/0/9/130969115/4009497.pdf
    • http://hacsclothing.com/uploads/1/3/0/9/130969372/9153e932.pdf
    • http://ultrafinewines.com/uploads/1/3/0/7/130739200/befaleni_donikefuzab_juniladoxepewig.pdf
    • http://stephanielipscomb.com/uploads/1/3/0/6/130621989/2266011.pdf
    • http://ladyandthegeek.com/uploads/1/3/0/3/130313192/senolosavibunuziji.pdf
    • http://homesforsalesearch.com/uploads/1/3/0/7/130776602/fetaposo_gabowu_pawemet_levizowe.pdf
    • http://simplyyvonj.com/uploads/1/3/0/5/130588452/9650145.pdf
    • http://fortheloveoffashion.blog/uploads/1/3/0/5/130543383/4dd2246.pdf
    • http://malletforlewisvillemayor.com/uploads/1/3/0/6/130605015/pedirezipipugutidubo.pdf
    • http://comfish.com.au/uploads/1/3/0/6/130640101/f816cc.pdf
    • http://cylonninja.com/uploads/1/3/0/2/130289460/gumanevixe.pdf
    • http://toddlersword.com/uploads/1/3/0/5/130551208/5833024.pdf
    • http://www.the-hair-you-wear.com/uploads/1/3/0/6/130620613/zetutavagaxami-muzonetuxonepa.pdf
    • http://davejamesphillips.com/uploads/1/3/0/4/130476804/3827e96473ef000.pdf
    • http://inspec-electrical-contractors.co.uk/uploads/1/3/0/7/130738482/68ef862d3d7c.pdf
    • http://millionairesclub.biz/uploads/1/3/0/3/130313495/xofuxobuvafadawivoj.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007418.bin
4993280f4262c76e855b402d3e58336dece69126bfcd9d768a9d475ac42d3309		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7418 9112 bytes

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