Malicious PDF — malware analysis report

Static analysis result for SHA-256 118b1337e11cf3d1…

MALICIOUS

PDF

40.3 KB Created: 2020-04-02 16:52:02 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e54b27c4cb1ab488480898513ecb4600 SHA-1: c34e7c575ea66c04474e3f756b273f36a6052335 SHA-256: 118b1337e11cf3d1704482dc46c43b438acdabcbeb1a674f92ae7f5633059488
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting a malicious intent to manipulate search engine results or redirect users to potentially harmful content. The ML classifier also strongly flagged this PDF as malicious. While no scripts were directly extracted, the embedded URLs are the primary indicators of malicious activity, likely serving as a lure or part of a content farm.

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://kccforegon.com/uploads/1/3/1/4/131454459/131454459.html#persona+4+golden+books+guide
    • http://thanks.republican/uploads/1/3/0/6/130620612/lefifojavazunokulen.pdf
    • http://generationmuso.in/uploads/1/3/0/5/130543545/zetesuza.pdf
    • http://heartisam.com/uploads/1/3/0/6/130621119/mixuxugagu-segiveguvud.pdf
    • http://alanduckworthart.com/uploads/1/3/0/3/130379412/kanofoxogenotawu.pdf
    • http://reneemackenzie.net/uploads/1/3/0/8/130815031/10f049c8529f22.pdf
    • http://pchrestorations.com/uploads/1/3/0/6/130605440/pepitekurej.pdf
    • http://dejavu-producties.com/uploads/1/3/0/5/130550715/jegogozenoxog_kewepek_pewimuzubig_tijar.pdf
    • http://roxiesfunko.net/uploads/1/3/0/9/130969664/borow.pdf
    • http://smarthinkhub.com/uploads/1/3/0/6/130605403/9608071.pdf
    • http://bobbicavincounseling.com/uploads/1/3/0/2/130272094/88c89c30.pdf
    • http://scheurle.ch/uploads/1/3/0/2/130289760/wozenatokira.pdf
    • http://perfectlyimperfectgifts.com/uploads/1/3/0/7/130775596/b18a072f2d97.pdf
    • http://caseycorp.biz/uploads/1/3/0/9/130969596/tafolavanutigupa.pdf
    • http://chcrane.com/uploads/1/3/1/3/131384173/65a6374.pdf
    • http://millersremodeling.org/uploads/1/3/1/3/131379965/3003956.pdf
    • http://trophy.coffee/uploads/1/3/0/8/130814935/6428687.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_off00007643.bin
91b3b3ee8e3fe82cb546528a828a512096a9ac54d33b917a6284f9ff4cdbfa52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7643 7708 bytes

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