Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5970603d3c8ac3e…

MALICIOUS

PDF

34.9 KB Created: 2020-04-10 20:38:53 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 9dcba78bbb686d3289f4ced86708802f SHA-1: a2260d954f1c4aa1be50b1a94ac8669543be5668 SHA-256: a5970603d3c8ac3e27ebbd1c2c231a5ffb105601c579194a5f7c82491534d204
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links to other PDF files hosted on various domains, indicating a link farm or SEO poisoning tactic. The ML classifier strongly flagged this PDF as malicious. The document body contains garbled text but also includes the primary URL, suggesting the intent is to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://kiteklinik.eu/uploads/1/3/0/6/130604191/130604191.html#reine+ny%C3%A9e+dofus
    • http://ghettomaderecords.com/uploads/1/3/0/4/130492229/5d856906cbe.pdf
    • http://rootzdesign.com/uploads/1/3/1/3/131379696/duzix-mowid.pdf
    • http://stronglikebear.org/uploads/1/3/0/2/130289589/c1f4f702d2.pdf
    • http://richardkarmingho.com/uploads/1/3/0/7/130776141/d428d2c.pdf
    • http://aquaticadvantagellc.com/uploads/1/3/1/4/131406430/7295564.pdf
    • http://hairbycharise.com/uploads/1/3/0/5/130550846/d289a3.pdf
    • http://slement.fr/uploads/1/3/0/5/130588977/bbf64.pdf
    • http://waldohopfest.com/uploads/1/3/0/8/130874536/dolute.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_off00005f25.bin
b22c18d1856e563561df001067541207c8dbe5f7c154672ffc482dd8fb32892d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F25 7860 bytes

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