Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd1a92e36919776a…

MALICIOUS

PDF

40.8 KB Created: 2020-04-02 08:28:57 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e8cbdb2b02cdbb44bfc592ff1bed923c SHA-1: a46a7074a3ce7c161667759f013ab7660760deb0 SHA-256: dd1a92e36919776aae279d7e45c4e2e0ec6fb7cd1b397ae4435ab934c79a2b82
96 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML_NYX_PDF_MALICIOUS classifier strongly indicates malicious intent. The document body, though partially corrupted, contains a URL that is also present in the list of external links. The primary attack pattern appears to be a link farm designed to manipulate search engine results or distribute content from numerous domains.

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://flixfolio.com/uploads/1/3/0/2/130291593/130291593.html#que+es+rima+asonante+ejemplos
    • http://afuckingstory.com/uploads/1/3/0/9/130969204/5176659.pdf
    • http://carpetcleaningcdaid.com/uploads/1/3/0/2/130272638/238f883f043.pdf
    • http://alisonic.net/uploads/1/3/0/5/130550846/3899968.pdf
    • http://thetruetechies.com/uploads/1/3/1/1/131164322/d26d1f3a9.pdf
    • http://pentecostlifecentre.com.au/uploads/1/3/0/6/130639321/boxoli_kejumokedarovuv.pdf
    • http://myprintpad.com/uploads/1/3/0/6/130621278/3874623.pdf
    • http://stevenscontractingllc.net/uploads/1/3/0/5/130538833/buwusivulekuru.pdf
    • http://redwood.tools/uploads/1/3/0/2/130288364/zibajade.pdf
    • http://flightcojewelry.com/uploads/1/3/0/2/130271206/jezelanum.pdf
    • http://gelbkeismyagent.com/uploads/1/3/0/2/130287883/bonilemaki_wafogab_subovugo.pdf
    • http://wherefuturebegin.com/uploads/1/3/0/8/130874429/25f7e7f9cd.pdf
    • http://fdotlew.com/uploads/1/3/0/8/130814803/f37f1614a6f06.pdf
    • http://creatingourbaby.com/uploads/1/3/0/3/130313428/sutuxef.pdf
    • http://newledgerbookkeeping.com/uploads/1/3/0/2/130271243/wesedip_japoxipasof_vasafopasod.pdf
    • http://zendma.com/uploads/1/3/0/4/130436095/godudijabovuvuj.pdf
    • http://inthedarkfeaturefilm.com/uploads/1/3/0/4/130483178/kusikon.pdf
    • http://fishedimpression.com/uploads/1/3/1/0/131069893/9680621.pdf
    • http://cussingcaker.com/uploads/1/3/0/5/130546657/a2383b4dc62b47.pdf
    • http://wiesefundinggroup.com/uploads/1/3/0/9/130969072/xuzanigogirona.pdf
    • http://clubcooeesupport.com/uploads/1/3/1/3/131379980/gosoremex.pdf
    • http://foodriot.net/uploads/1/3/1/3/131379729/lomizitufova-fazojedetoxijib.pdf
    • http://hwollintherapy.com/uploads/1/3/0/6/130621233/figezode.pdf
    • http://letsdiscovertogether.org/uploads/1/3/1/4/131438304/gikim_vajabagokatak_pajopikaxuz.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_off000073e2.bin
d4a9944e034b88e76f0dc1cddb4e2621791c74aabbd01066dbdcd03a3f2c89e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73E2 8836 bytes

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