Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b4a372358a37cfa…

MALICIOUS

PDF

41.4 KB Created: 2020-04-11 00:58:59 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 55fd720489192bc0babd80ce4ecc42d6 SHA-1: a242bda042b75768326f29461b87a80de37d5568 SHA-256: 6b4a372358a37cfad96b2dae2b01f0099e4d614d07d090812e760c14a2fedae0
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a large number of external links, characteristic of a link farm or SEO abuse. The embedded URL 'http://74-123-75-101.mgwnet.com/uploads/1/3/0/2/130288514/130288514.html#ya+boy+clip+vs+tyranny' is likely intended to redirect users to malicious content or further phishing pages. The ML classifier strongly indicated maliciousness, supporting the link farm heuristic.

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://74-123-75-101.mgwnet.com/uploads/1/3/0/2/130288514/130288514.html#ya+boy+clip+vs+tyranny
    • http://okcwood.com/uploads/1/3/0/4/130476574/94bffd9158.pdf
    • http://gvk4nm.com/uploads/1/3/0/7/130739831/xadokav.pdf
    • http://truepotential.life/uploads/1/3/1/0/131070652/0ac2a8e.pdf
    • http://rrphotography.studio/uploads/1/3/0/6/130620195/pusivekorolifasi.pdf
    • http://slfexhibition.com/uploads/1/3/0/8/130813547/nelabixek.pdf
    • http://commonwealth-designs.com/uploads/1/3/0/6/130620230/7624330.pdf
    • http://bixbyhoco.com/uploads/1/3/0/9/130969185/letejun.pdf
    • http://lahaina-arts.org/uploads/1/3/1/4/131406861/5044162.pdf
    • http://collegetowninvestments.com/uploads/1/3/1/1/131164293/6020817.pdf
    • http://premierbrokersrealestate.com/uploads/1/3/0/3/130323888/wexow.pdf
    • http://jojobranding.com/uploads/1/3/0/5/130550809/kigadovunudi_sorukubevagow.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/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000620f.bin
012c2dc5c613a46cc14f7bad50fa0cdf8b2289753c9f0b5460c704ce2cd072f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x620F 8840 bytes
font_01_sfnt_off000083b7.bin
075aaee42309897b1b654f36e31d1bd1faa43e2d0933193c16a16317f0abdd02		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83B7 16272 bytes

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