Malicious PDF — malware analysis report

Static analysis result for SHA-256 e58bfbc59aac4785…

MALICIOUS

PDF

31.9 KB Created: 2020-05-31 22:25:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5567e26aa7f8a7d958e006d90e2b1989 SHA-1: 22120fa2106e75d080efd79c0f456bf542512969 SHA-256: e58bfbc59aac478525e77bfbe8ecdeb1f81ea730b78f93b404937a1cf98f2b91
122 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files hosted on WordPress.com. The ClamAV detection as Pdf.Dropper.Agent-9225433-0 further confirms its malicious nature. The primary IOC is the initial external URL, which likely serves as a gateway to the link farm.

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.
  • ClamAV: Pdf.Dropper.Agent-9225433-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-9225433-0
  • 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://sangeetadharamraj.com/uploads/1/3/1/1/131163638/131163638.html#definitional+claim+examples
    • https://kijomevoduno.files.wordpress.com/2020/05/414366330.pdf
    • https://zuwafigixitu.files.wordpress.com/2020/05/93863845280.pdf
    • https://gosivev.files.wordpress.com/2020/05/xudivuxoril.pdf
    • https://pekizov.files.wordpress.com/2020/05/80953061273.pdf
    • https://fewogixaba.files.wordpress.com/2020/05/42672236965.pdf
    • https://samudazekami.files.wordpress.com/2020/05/jatixe.pdf
    • https://sabepata.files.wordpress.com/2020/05/42851711998.pdf
    • https://muvowovu.files.wordpress.com/2020/05/94830638272.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_off00005367.bin
323af54b088e5916581e8821959ee1a01a07732b489696d6519b2d0303b799d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5367 9804 bytes

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