Malicious PDF — malware analysis report

Static analysis result for SHA-256 7944f06965c89e89…

MALICIOUS

PDF

45.6 KB Authoring application: Solid Converter PDF
MD5: 9223b113b8f600fdedd0cb5eca6c2d6a SHA-1: 62a10fc86203d642a195d31da1cefd3cc17da934 SHA-256: 7944f06965c89e89355501bc69e8b91a4054ffc1c4585153389d107a7acb3e03
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files on different domains. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically classified as phishing. While no scripts were directly extracted, the structure suggests a potential attempt to redirect users to malicious content or for SEO abuse.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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://stargazingangel.com/uploads/1/3/0/6/130605238/rewajis.pdf
    • http://levipark.co.nz/uploads/1/3/0/3/130323455/93562.pdf
    • http://jenniferstefanac.org/uploads/1/3/0/6/130603976/lilavinil-nasam-sinapi-kazemekili.pdf
    • http://paigeleandraphotography.com/uploads/1/3/0/6/130605044/1156556.pdf
    • http://mindforyou.org/uploads/1/3/0/6/130604196/130604196.html#oral+presentation+structure+example
    • http://fontawesome.iohttp://fontawesome.io/license/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001231.bin
e7c15af3ec1e62c0e616d376a5b0e34964e08c2e96f59b9929f61053008c87f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1231 8776 bytes
font_01_sfnt_off000077f5.bin
bbc26bb929a056d13dc9195b838f4efc775e5d0da3271bcbe8be44c6e83d5388		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77F5 2120 bytes

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