Malicious PDF — malware analysis report

Static analysis result for SHA-256 050ab7056019c182…

MALICIOUS

PDF

36.1 KB Created: 2020-03-29 04:27:12 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 68d11254c9c304711d45d10ad7ac9d4c SHA-1: 3c25e56d27ca15e7fcb9ff5cface41022330d1ce SHA-256: 050ab7056019c1826e3914c49da868565f3d3d3b70aea37da718c7c6b84faa0e
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links to various domains, identified as a link farm. The document body, though partially obfuscated, contains a URL that points to a specific HTML page, and the heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links. This suggests the file is designed to drive traffic to these external sites, potentially for SEO manipulation or to host further malicious content.

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://nashobavalleyextractco.com/uploads/1/3/0/7/130740562/130740562.html#incoterms+2010+fob+vs+fca
    • http://brokerjana.com/uploads/1/3/0/6/130622048/7011574.pdf
    • http://boomersblessings.com/uploads/1/3/0/2/130289793/wudig.pdf
    • http://graysonglobalfinds.com/uploads/1/3/0/6/130640003/dututomufafizewujizo.pdf
    • http://mairu-tabi-bonbigirl.com/uploads/1/3/0/2/130287257/sararoxutomexu_ritexax_xurotegek_xozabirigavex.pdf
    • http://www.cozycoverbooks.com/uploads/1/3/0/6/130605388/9100.pdf
    • http://www.hagahlife.com/uploads/1/3/0/6/130605015/tedaxunuwumimo-gedowuvopip-totibuxubur.pdf
    • http://theswishradio.com/uploads/1/3/0/4/130488583/jowaked-xuduzusa.pdf
    • http://mail.inspirare.co.uk/uploads/1/3/0/6/130604154/zulomofis.pdf
    • http://steel-linegroup.com.au/uploads/1/3/0/7/130776420/5271666.pdf
    • http://tinatan.com/uploads/1/3/0/6/130620449/9279099.pdf
    • http://kidderslawnservice.com/uploads/1/3/0/8/130814208/zokijivavidop.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_off00006550.bin
e2f126b987c1a8ea0ce387c0e2cdcce0659fd74791816e05693a462aafd6793f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6550 7844 bytes

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