Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffc426742d9b2504…

MALICIOUS

PDF

28.5 KB Created: 2020-04-12 12:31:12 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 059e22a32b67fc2ed86fae528223bced SHA-1: 4ff2c0ee08c21f46a87e91fb73dd8a1b9f19f3fd SHA-256: ffc426742d9b25041973f32cad708f0edebfe45b87708ac096d97b5d4f27824f
92 Risk Score

Malware Insights

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

The PDF file contains a large number of external links to various domains, identified as a PDF_SEO_LINK_FARM heuristic. The embedded document body also contains several of these URLs, 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 potentially malicious or spam-related PDF documents hosted on unrelated domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9962

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://three-ps-in-a-pod.com/uploads/1/3/1/0/131071166/131071166.html#olfa+rotary+cutter+blade+replacement
    • http://handworkscoffeestudio.com/uploads/1/3/0/2/130287940/e61f8bf.pdf
    • http://glenndalfsmusicalglasses.com/uploads/1/3/0/6/130620962/39d50d8c0d7c.pdf
    • http://divinebeautylondon.com/uploads/1/3/1/3/131379296/3545887.pdf
    • http://netherplay.org/uploads/1/3/0/6/130603760/1145683.pdf
    • http://mid-atlanticmountainworks.com/uploads/1/3/0/5/130590661/bujogikexurixapogad.pdf
    • http://fwtcareers.com/uploads/1/3/0/3/130324050/3f523a3.pdf
    • http://dilf.blog/uploads/1/3/0/3/130379204/donevinorot_xasetu_kibokamexasizig.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_off000049bb.bin
faccf114f57bf00fa4c67dbe83d1fbf89372d30e2efe97b33e0880f5097d6ad6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x49BB 7244 bytes

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