Malicious PDF — malware analysis report

Static analysis result for SHA-256 5703b3b15fd1d51a…

MALICIOUS

PDF

41.6 KB Created: 2020-04-25 21:33:33 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 006838594521fde4ffbbf569fd10c402 SHA-1: 3252409024008b1f42949fe947aafd8ae35acf6f SHA-256: 5703b3b15fd1d51a5a64d8eb0efc4728e619a544cc09c89b59412618d1848cd6
92 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links to various domains, identified by the PDF_SEO_LINK_FARM heuristic. These links point to PDF files and HTML pages, suggesting a link farm or redirection scheme. The ML classifier also flagged this PDF as malicious. The primary intent appears to be directing users to a network of websites, likely for SEO manipulation or to host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://thelogobro.com/uploads/1/3/0/3/130313140/130313140.html#c%2F+s%2F+b+full+form+in+medical
    • http://melthammoorwraparoundclub.com/uploads/1/3/1/4/131407807/2659974.pdf
    • http://vidapearson.website/uploads/1/3/1/4/131452922/ganoxizajakivo_gogurokotox_tugikidaxi_nozobowofezadi.pdf
    • http://artdenuage.com/uploads/1/3/0/5/130550708/f82527167576f4a.pdf
    • http://emmaelliottraditional.com/uploads/1/3/0/5/130588595/rimal.pdf
    • http://my-tcr.com/uploads/1/3/0/7/130739579/4143c8.pdf
    • http://plugmusiq.com/uploads/1/3/1/4/131452846/bupilu.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_off000062a7.bin
5e88702acb9941fb559eb99d25c155ff02b3a5ba2926bce93431bb3f519e42fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62A7 9672 bytes
font_01_sfnt_off0000852e.bin
bcf5fc35ddfcf873f1ad2ef0ea8a6b5ccdc8b53ee4b4aa86e6d38efd202e7288		 pdf-font-stream PDF embedded font (sfnt) at offset 0x852E 16160 bytes

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