Malicious PDF — malware analysis report

Static analysis result for SHA-256 acaa0706c05e2b73…

MALICIOUS

PDF

39.5 KB Created: 2020-05-19 02:18:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d6b33ffc0b8f09eb354d1e7dc16ee2d SHA-1: 2e9c0ac5913e2323791912ea4aee88448f885f48 SHA-256: acaa0706c05e2b7369ba96bdf6e087bc7c09f96fb015da51729aae38297dd6c4
92 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier as malicious. It contains a significant number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting a tactic to overwhelm search engines or distribute malicious content. The primary attack pattern involves luring users to external sites via these links, such as http://desertfoothillsinspection.com/uploads/1/3/0/5/130543173/130543173.html#borderlands+3+flakker.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://desertfoothillsinspection.com/uploads/1/3/0/5/130543173/130543173.html#borderlands+3+flakker
    • http://vanoorspronkadvies.nl/uploads/1/3/0/8/130874085/7416235.pdf
    • http://grandcanyonatitsbest.com/uploads/1/3/1/4/131407632/sidetula.pdf
    • http://histouric.org/uploads/1/3/1/3/131383933/revesotuserire.pdf
    • http://nanmade-bags.com/uploads/1/3/1/4/131484467/76bae7faac9f928.pdf
    • http://beewellmassagemn.net/uploads/1/3/1/6/131637484/zebamulivava.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_off00006e45.bin
6a3a2a0ab9bf7bffdef0bb16cc2f279d92ce10c7b5383a235211d837e003442b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E45 11152 bytes

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