Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9bc0cac82055f6c…

MALICIOUS

PDF

27.9 KB Created: 2020-04-13 07:23:08 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 56f032fd7cd67ddfad3d6eee1b86f3d7 SHA-1: 072c5797fb0fd047368e5cabd20e638e414caf07 SHA-256: a9bc0cac82055f6c0700bd900f6c57115d144a9ab4be86410fef030f184a866f
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Phishing:Spearphishing Attachment T1204.002 Malicious File:Malicious Link

The PDF file contains a large number of embedded external URLs, many of which point to domains that appear to be part of a link farm. The heuristic PDF_SEO_LINK_FARM firing indicates that the PDF is designed to generate traffic to these external sites. The document body contains a mix of seemingly legitimate text and the embedded URLs, suggesting a lure to click on these links.

Heuristics 3

  • 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
  • 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://usa-autoss.com/uploads/1/3/0/3/130313319/130313319.html#ap+human+geography+quizlet+chapter+1-6
    • http://plussizeweddingdressrhodeisland.com/uploads/1/3/0/5/130541744/golux.pdf
    • http://unkocdn.com/uploads/1/3/0/5/130551697/totuzal.pdf
    • http://ineedabookkeeper.co/uploads/1/3/0/5/130588951/892d19d.pdf
    • http://fearneaux.com/uploads/1/3/0/4/130435813/mekoruxixopujozumar.pdf
    • http://karensboutiqueonline.com/uploads/1/3/1/3/131381103/rezomile.pdf
    • http://sjmyardcreations.com/uploads/1/3/0/4/130435602/nisulerogezumar.pdf
    • http://dubewholesale.com/uploads/1/3/0/2/130289611/4312603.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_off000044c3.bin
dc222c4302a25a987d0aee9f42f1d848bcbb7dd1ffa3523dee0ce028cf74a279		 pdf-font-stream PDF embedded font (sfnt) at offset 0x44C3 7540 bytes

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