Malicious PDF — malware analysis report

Static analysis result for SHA-256 45e9246dc1612c8a…

MALICIOUS

PDF

60.5 KB Created: 2020-03-10 04:41:51 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d65c50f6d97c9569816a339564b8637f SHA-1: b379ea32a6346261f9930ccf80c5f0d2999d8069 SHA-256: 45e9246dc1612c8a19a4a44cba20024b40adaeb1dfe821859250adcb5671b96d
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection to malicious content. The ML classifier also strongly indicated maliciousness. The document body, though malformed, contains metadata and URLs consistent with this behavior. No scripts were extracted, but the sheer volume of outbound links is highly suspicious.

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://adsl-63-204-18-23.benefitplans.org/uploads/1/3/0/8/130813458/130813458.html#project+manager+duties+and+responsibilities+pdf
    • http://hostmaster.data-responsibility.org/uploads/1/3/0/7/130775309/68a757.pdf
    • http://www.madzladz.com/uploads/1/3/0/9/130969198/5347111.pdf
    • http://happybrownbag.com/uploads/1/3/0/7/130776828/6899151.pdf
    • http://debbiesdynamicdesigns.com/uploads/1/3/0/3/130313368/nezufujiz-xovefaluneb-ximedigirimawe.pdf
    • http://crowandbetty.com/uploads/1/3/0/5/130588220/papisazozupikikipis.pdf
    • http://2008hondaex-l.com/uploads/1/3/0/2/130289772/sunej_judopalitik_fojifojusuzami_detegikazedawoz.pdf
    • http://onpointdrones.net/uploads/1/3/0/6/130620631/0fe97c988a.pdf
    • http://yourmateapparel.com/uploads/1/3/0/6/130604196/donosadesot.pdf
    • http://barefootbusinessbloggers.com/uploads/1/3/0/6/130604945/5053367.pdf
    • http://newcityvintage.com/uploads/1/3/0/6/130639977/29595.pdf
    • http://webmail.musicforhaunts.com/uploads/1/3/0/5/130588579/5333234.pdf
    • http://4011sports.com/uploads/1/3/0/7/130739916/309710.pdf
    • http://sarahrileypottery.com/uploads/1/3/0/7/130775632/vedijirobe-kafag.pdf
    • http://nsucc.com/uploads/1/3/0/2/130270792/1268425.pdf
    • http://10dayfilm.org/uploads/1/3/0/3/130313466/5689592.pdf
    • http://islamophoria.com/uploads/1/3/0/7/130776066/lopimolo-topiwevunopo.pdf
    • http://camelcottage.com/uploads/1/3/0/5/130588149/9703299.pdf
    • http://drumcruise.com/uploads/1/3/0/5/130588493/jarebije.pdf
    • http://metroheatingandair.com/uploads/1/3/0/6/130620773/5c7621d1f91b.pdf
    • http://soulstarmassage.com/uploads/1/3/0/8/130813834/2352707.pdf
    • http://mynastybath.com/uploads/1/3/0/7/130775130/widufevudakol_togusibod_ronad.pdf
    • http://www.bricollins.com/uploads/1/3/0/7/130776490/dajugezoduboxumefaja.pdf
    • http://callanjames.co.nz/uploads/1/3/0/6/130604193/jajodelasupip_toxabuxis_riraroruto.pdf
    • http://www.mynutrition101.com/uploads/1/3/0/4/130476102/7813056.pdf
    • http://conquercoffee.com/uploads/1/3/0/7/130775228/85ce33.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_off0000bf78.bin
f48003797553d85b6ecbba21c68ea543cd2ccf50c5a4646b747dc7626aeed0f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF78 9500 bytes

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