Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e13fa2a3e31547d…

MALICIOUS

PDF

36.4 KB Created: 2020-06-20 13:05:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 82252de3ec65b9ffaf4d1664b39f6f88 SHA-1: a77b1b69ffec8096cf1a22d55bd103af0be65f79 SHA-256: 3e13fa2a3e31547d896d4c9360a546cdbcc55a308b8dc7eec149226aa4039a21
62 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, many of which point to other PDF files with numeric slugs, indicative of a link farm or SEO spamming technique. The document body text is minimal and appears to be a lure related to car parts. The primary heuristic 'PDF_SEO_LINK_FARM' strongly suggests this is a malicious document designed to distribute content or traffic through a network of linked PDFs. No scripts were extracted from this sample.

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://hotelgranplaza.devsite-1.com/uploads/1/3/1/3/131379406/131379406.html#pontiac+gto+manual+transmission+for+sale
    • http://disdevotion.org/uploads/1/3/1/3/131383607/boxinujazosugepexu.pdf
    • http://worldsfirstwines.com/uploads/1/3/1/0/131070355/cd446.pdf
    • http://cpanel.plainseagle.com/uploads/1/3/2/6/132696512/79956e29641f1e.pdf
    • http://myraysoflight.com/uploads/1/3/0/5/130590475/1fcb0e.pdf
    • http://hbtechnicalservices.net/uploads/1/3/1/8/131856257/nebimekel-ledepazifowe-motokixipo.pdf
    • http://grandmabaa.com/uploads/1/3/0/4/130435947/6db44ddf7.pdf
    • http://karimsslstarter.w33blyqa.com/uploads/1/3/0/5/130542965/xubedugig-pufel-figok.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004e57.bin
8ec45d49797469ff56404372d479fa7e1a73b96380df1b4b6b08230180fff9c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E57 5084 bytes
font_01_sfnt_off00005f81.bin
ad0e4aa25b59a15689ac208ea9f33993f9d14493f98bab077792d4d1fbba8096		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F81 11248 bytes

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