Malicious PDF — malware analysis report

Static analysis result for SHA-256 25d519c7de5462dc…

MALICIOUS

PDF

34.3 KB Created: 2020-04-22 07:07:29 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 019c45ac1e659ea7f659a1cc39d59991 SHA-1: 9b912d3f93e1154b6422271fdf17bd2eca47bc48 SHA-256: 25d519c7de5462dc5d332ceaca8eef8c6781cc38526a3eef3ed94b74b6566c21
92 Risk Score

Malware Insights

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

The PDF file contains a large number of external links to other PDF files hosted on various domains, indicative of a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious. The primary intent appears to be directing users to a network of potentially malicious or spam-related websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://pridemarkglobal.com/uploads/1/3/1/4/131454500/131454500.html#liverpool+wallpaper+4k
    • http://family1stpropertiesllc.org/uploads/1/3/1/0/131070401/5744017.pdf
    • http://pretinperna.com/uploads/1/3/0/5/130539107/6994877.pdf
    • http://alpinetransit.com/uploads/1/3/1/4/131438873/7213710.pdf
    • http://clowultimatehealthsolutions.com/uploads/1/3/0/2/130288465/a236134b9.pdf
    • http://portatools.com/uploads/1/3/0/7/130739621/7cad3f2.pdf
    • http://goldstarcommercialcleaning.com/uploads/1/3/0/8/130873802/jutufe-kuremu-merawupil.pdf
    • http://dulcettreats.com/uploads/1/3/0/6/130603942/8597196.pdf
    • http://ocwpublishing.com/uploads/1/3/0/9/130969762/3552073.pdf
    • http://pilonmecanique.net/uploads/1/3/0/2/130270912/7298605.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_off00005d88.bin
733a77a6d7f6d4568b0d3f7e023c97b265e28436f25dc5da56915c537c2509a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D88 8292 bytes

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