Malicious PDF — malware analysis report

Static analysis result for SHA-256 84e71e77f471f366…

MALICIOUS

PDF

63.1 KB Created: 2020-04-21 06:22:26 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 98f72abf8d7ce0fa6f572865c3ec9a0e SHA-1: 768c9fc21b19fec63ac380979f677fd714d7b3cb SHA-256: 84e71e77f471f3666e44a404cc6ecc1b69eeb40054ae8a8936a572d9f033bcd4
92 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, with numerous external URLs pointing to other PDF documents. The ML classifier strongly indicated maliciousness. The primary attack pattern involves leveraging these links, likely for SEO manipulation or to distribute further malicious payloads, although no specific script was found to execute directly from this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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://montanahollidayglass.com/uploads/1/3/1/1/131164496/131164496.html#wrestlemania+34+bleacher+report
    • http://steppingstonesforwellness.com/uploads/1/3/1/4/131407144/lutemez.pdf
    • http://creativwork.net/uploads/1/3/1/6/131606174/e8439e0db444.pdf
    • http://straushistory.org/uploads/1/3/1/3/131384436/3d76957e0f03628.pdf
    • http://xn--pfnderhonig-m8a.com/uploads/1/3/0/3/130313263/c4db3385.pdf
    • http://gocarpetpros.com/uploads/1/3/0/6/130622038/guzixibajoxa.pdf
    • http://croslislaw.com/uploads/1/3/0/5/130543383/2959115.pdf
    • http://ganicxnaturals.com/uploads/1/3/0/4/130436014/561111.pdf
    • http://straushistory.org/uploads/1/3/1/3/131384436/3d76957e0f03628.p
    • 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_off0000d008.bin
1d37d8ce0c98ec1151ea3e9550ff42aa141f4e26782cf3c0f8aba778ea14c593		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD008 7948 bytes

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