Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd6c488258ff4b3b…

MALICIOUS

PDF

48.9 KB Created: 2020-04-14 17:23:25 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1dd8b2a519c13325bf8f80d4b1483a10 SHA-1: c0e59e5bc4884fa0fe1dd060a03e98348c8bf5d2 SHA-256: fd6c488258ff4b3b970b1d17271c364daa296647958f530789247312d5fef477
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of external links, many of which point to other PDF files with numeric or generic slugs, indicative of a link farm or SEO abuse. The primary lure appears to be a "warlock guide". The ML classifier strongly flagged this PDF as malicious. The presence of numerous unknown-reputation URLs suggests a distribution network for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://liftedout.com/uploads/1/3/0/8/130814226/130814226.html#5e+warlock+guide+great+old+one
    • http://kindkonnects.com/uploads/1/3/0/7/130739952/51d01822f3.pdf
    • http://ultracooltrends.com/uploads/1/3/0/4/130476062/zedozapurude.pdf
    • http://crazyfoxfit.com/uploads/1/3/0/2/130287835/4030651.pdf
    • http://ancientideasformoderntimes.com/uploads/1/3/0/7/130740173/jijosa-mejobabojagof-sodulosujoxodo.pdf
    • http://frugal.group/uploads/1/3/0/6/130639700/27b2fca27d76c.pdf
    • http://iascleaning.com/uploads/1/3/0/6/130621772/fepivakuzimip.pdf
    • http://mhclondonlimited.com/uploads/1/3/1/4/131406510/47c37aedc.pdf
    • http://robedward.com/uploads/1/3/0/6/130622058/jamijumemijen.pdf
    • http://nomadtransportation.net/uploads/1/3/0/2/130288483/3b911.pdf
    • http://kaylawinterton.com/uploads/1/3/0/5/130544379/4394a4937b.pdf
    • http://stephensthings.com/uploads/1/3/0/5/130588581/4d5b83b48ce897f.pdf
    • http://bhavaniconstruction.com/uploads/1/3/0/8/130813417/7451995.pdf
    • http://albessentials.com/uploads/1/3/0/5/130590076/2719560.pdf
    • http://olympiagymandfitness1.com/uploads/1/3/1/4/131437725/tokarureferiw_sovuti_dosokeluxo.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_off000097a8.bin
0ae8a325de705e87b46551b207ab324334246f72814b6913aa27dd38974702c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97A8 8272 bytes

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