Malicious PDF — malware analysis report

Static analysis result for SHA-256 e96f5d9cd762e51a…

MALICIOUS

PDF

33.2 KB Created: 2020-04-29 03:23:09 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 0f2a26cd55cb945064f898e1d067372e SHA-1: fb9a0919d67186c615c0c7a5aebddbb783035f52 SHA-256: e96f5d9cd762e51ac8d644d029a656b2d6361a92b85fc7827de52a986e7da8d6
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 are numerically or generically named, suggesting a link farm or SEO spam tactic. The ML classifier strongly indicated maliciousness. The primary attack pattern involves redirecting users to external sites, likely for phishing or malware delivery. No scripts were extracted, limiting the analysis of direct payload execution.

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://charbosworldofservices.net/uploads/1/3/0/2/130272934/130272934.html#kelley+blue+book+motorhome+guide
    • http://comtradeinternational.com/uploads/1/3/0/2/130272988/ranedatobulorafax.pdf
    • http://carroattrezziusati.com/uploads/1/3/0/7/130776273/vovowakotik_foguketu_witepom.pdf
    • http://mountainzonewaterpolo.com/uploads/1/3/0/7/130776779/jasokun.pdf
    • http://penetis.org/uploads/1/3/0/8/130873730/pubopebezil_lubim_zedotilapikor_xekema.pdf
    • http://santafeinfantcare.org/uploads/1/3/1/1/131164120/mavoninibajuweg.pdf
    • http://folkartbyfaith.com/uploads/1/3/0/6/130621765/96c01d.pdf
    • http://badgirlrepublic.com/uploads/1/3/0/5/130588564/pabusu.pdf
    • http://strokehelp.org/uploads/1/3/0/3/130323523/14acb58.pdf
    • http://wendieelovich.com/uploads/1/3/0/7/130775826/391d773e0e.pdf
    • http://gatewayblvd-sv.com/uploads/1/3/0/7/130739498/3186197.pdf
    • http://djsergsniper.com/uploads/1/3/1/4/131453325/bumik.pdf
    • http://redcloudcompanies.com/uploads/1/3/0/4/130476062/lexetesutebemim-xaseje-wufus-xonarimexajow.pdf
    • http://liafalls.com/uploads/1/3/0/6/130604527/b52b3ca5a187a5.pdf
    • http://fountainoflifesupportservices.org/uploads/1/3/1/4/131453733/kitimuzogali_jepunanekow_fodivonam.pdf
    • http://gatewayblvd-sv.com/uploads
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000619c.bin
8e592808b073a5182ebf3b64e821cd627bbd81c3a9a62cffb540814a68c336bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x619C 7256 bytes

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