Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb9d06600067eebd…

MALICIOUS

PDF

31.8 KB Created: 2020-04-11 00:50:40 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 9c946f86ce4f561d4b1190dd7918b424 SHA-1: aa3b3274eeebbdc893ad6859b11f0fef37244b7c SHA-256: bb9d06600067eebd7fe9f18f4a87eba93aef1dd8a69cd803ee6fced874a618b1
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a technique often used for SEO spam or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness. The embedded URLs are likely part of a link farm designed to distribute traffic or 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://74-123-72-211.mgwnet.com/uploads/1/3/1/4/131453018/131453018.html#balance+de+cargas+electricas+trifasicas+pdf
    • http://bellinghamgreekfestival.org/uploads/1/3/0/7/130776526/lawes.pdf
    • http://giftshopgifts.com/uploads/1/3/0/2/130291478/9c3d491b.pdf
    • http://prceducation.net/uploads/1/3/0/7/130775386/e0b273b39.pdf
    • http://ustraveldocuments.org/uploads/1/3/1/4/131406505/5448835.pdf
    • http://youthforchristministries.info/uploads/1/3/0/7/130775403/cc23b7793f.pdf
    • http://cre8te.org/uploads/1/3/0/8/130874272/rumimano-fazaluwebudosij-gapodibuz-minok.pdf
    • http://texasstarlighttech.com/uploads/1/3/0/7/130776037/9889937.pdf
    • http://livingstoncountygolfassociation.com/uploads/1/3/0/5/130589057/1d01778.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_off000056b9.bin
9bd9e267bc1f22d5b6092a12c43cab462f813929e6a81df3dc1c03f155c8fbb8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56B9 7796 bytes

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