Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2e1fb6ac5d2b717…

MALICIOUS

PDF

35.0 KB Created: 2020-04-30 09:21:50 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 8c8edd39b8ffb607cd9b4622368fbd77 SHA-1: f763450b19c8e0293f5e3f189ad00d14c4010c2d SHA-256: d2e1fb6ac5d2b71719658f4d94168361a7708c8ace259458c5d71fef6941c579
62 Risk Score

Malware Insights

MITRE ATT&CK
T1598 Gather Victim Identity Information T1204 Malicious Link

The PDF file contains a significant number of external links, identified by the 'PDF_SEO_LINK_FARM' heuristic. These links point to various domains, suggesting an attempt to create a link farm. The document body, though partially corrupted, contains text related to 'numbers worksheets' and mentions 'wkhtmltopdf', indicating it might be a lure document. The primary attack pattern involves redirecting users to a large number of external URLs, likely for SEO manipulation or to host further malicious content.

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://mcatgent.org/uploads/1/3/1/3/131398564/131398564.html#numbers+worksheets+1-+20+esl
    • http://riankaglassjewelry.com/uploads/1/3/0/3/130323602/7573867.pdf
    • http://saltydogsailorgear.com/uploads/1/3/1/3/131398348/zukodineke.pdf
    • http://greensolutionsprovider.com/uploads/1/3/1/8/131856173/wojimekomebuk-paxenajibodo-zarorijojurug.pdf
    • http://mourntolight.com/uploads/1/3/0/5/130550948/77a3b98c6407f.pdf
    • http://raleighspraytan.com/uploads/1/3/1/4/131438120/bopew.pdf
    • http://equinegoodies.shop/uploads/1/3/0/3/130323216/mizepixirubodasibu.pdf
    • http://symbolicastrology.org/uploads/1/3/0/5/130551654/jusuzelitedu.pdf
    • http://terrenosaltohospicio.com/uploads/1/3/1/0/131070071/nefagovojuvibuxafa.pdf
    • http://poolcleanerslb.com/uploads/1/3/1/1/131163832/wudejaro_kagal.pdf
    • http://marketingconsumerbehaviorblog2.com/uploads/1/3/0/3/130379429/bidazexeranew.pdf
    • http://symbolicastrology.org/uploads/1/3/0/5/130551654/jusuzelite
    • 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_off00006193.bin
adfb1104f66fdd4bcf7d45b09f5a8f5590a87d006a065fbf6ddc1b06ba9a4ecb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6193 7844 bytes

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