Malicious PDF — malware analysis report

Static analysis result for SHA-256 9715243f450d1120…

MALICIOUS

PDF

34.4 KB Created: 2020-04-28 17:49:24 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 70dfc0b51f41014dd233b12c2f084888 SHA-1: bc4be67f08fd8b4a4658a6629a607e25d533ba42 SHA-256: 9715243f450d1120850042c0eeaa9c398cf12bfd8c18eb72dcf56d106614702e
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of external links, many of which point to similarly structured URLs on different domains. The document body, though heavily obfuscated, contains text related to medical reports and the wkhtmltopdf application. This suggests a link farm or SEO poisoning tactic to drive traffic to potentially malicious sites. No scripts were extracted, limiting the analysis of direct payload delivery mechanisms.

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://bluehavenhealing.com/uploads/1/3/0/5/130539672/130539672.html#endometrial+biopsy+interpretation+of+reports
    • http://helpnativefish.com/uploads/1/3/0/7/130738657/a86e0f3f6633.pdf
    • http://shebykei.com/uploads/1/3/1/6/131606263/7156220.pdf
    • http://plushmakeupartistry.ca/uploads/1/3/0/7/130739893/3528218.pdf
    • http://bsmcolumbus.com/uploads/1/3/0/2/130273740/907cc72c7714.pdf
    • http://ofisyvarendy.ru/uploads/1/3/0/9/130968925/6364218.pdf
    • http://excellentappliancerescue.net/uploads/1/3/1/4/131453592/tilisaxovoxen.pdf
    • http://destinydroneservices.com/uploads/1/3/0/7/130776577/zizomago.pdf
    • http://travelswithmymother.com/uploads/1/3/1/4/131452934/4767225.pdf
    • http://coolplanetfilm.com/uploads/1/3/0/3/130323315/jizerotisoju-bapefi.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_off00005fc8.bin
7e6e8794e6db59091dac86041de848f53729ea8db8dedd56b3e0ff860a651789		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC8 7712 bytes

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