Malicious PDF — malware analysis report

Static analysis result for SHA-256 21297dd5d1c59978…

MALICIOUS

PDF

37.4 KB Created: 2020-04-10 22:05:08 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 4f8f8235b9ebf3329d9d1b1f25b9da9a SHA-1: d12e9d08536e423ba0b892738f577c56afd9f24d SHA-256: 21297dd5d1c5997808b32d72087aefbe36c7d0ebc5c3413162b894219495b7c6
62 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, many of which appear to be part of a link farm or potentially used for phishing. The document body, though heavily obfuscated, contains references to URLs and what appears to be metadata from the wkhtmltopdf tool, suggesting it was programmatically generated. The primary intent appears to be directing users to these external sites.

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://sanyaduchang.br3h.com/uploads/1/3/0/7/130774994/130774994.html#one+piece+episode+809
    • http://11pluscolchester.com/uploads/1/3/1/3/131379029/6334c377b6d.pdf
    • http://bubblewafflecafebaku.com/uploads/1/3/0/7/130775334/noviliwakerasifajom.pdf
    • http://smartphonefilmfest.net/uploads/1/3/0/9/130969723/wuwerax.pdf
    • http://samanthalynnstanton.com/uploads/1/3/0/4/130489143/bdee80e.pdf
    • http://rainbowofgreenville.com/uploads/1/3/0/6/130621219/00c1a87c.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_off000062a1.bin
4627811136e4e041ac7cde9e2f91b7f165b0604d211986d5887d3d575f5707a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62A1 7772 bytes
font_01_sfnt_off00008008.bin
7863b829de04ea8b7f5be4d5dae43fa62182e7611f0c3a300d10b316d27db496		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8008 2732 bytes

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