Malicious PDF — malware analysis report

Static analysis result for SHA-256 796e4bb1f90c47a6…

MALICIOUS

PDF

45.8 KB Authoring application: PDFedit
MD5: 6c9ca84621c92df6c29b345f5a7631fc SHA-1: 6b957a590de2793cb1cc7fde7c7300bb8b72a50d SHA-256: 796e4bb1f90c47a688a160ed9a36556d6baf31509f1e2e963d4b9269020ed81f
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. These links point to various domains, suggesting a link farm or redirection scheme. The ClamAV detection and ML classifier also indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://skmmglobal.us/uploads/1/3/0/4/130483670/e82054894.pdf
    • http://beoriginalapparel.com/uploads/1/3/0/5/130589339/narufo.pdf
    • http://phillipskruse.com/uploads/1/3/0/7/130739084/378168c98edae.pdf
    • http://kilnedsy.store/uploads/1/3/0/2/130291822/ferivi.pdf
    • http://woodlandstuition.com/uploads/1/3/0/6/130604407/130604407.html#arunachalam+movie++playtamil

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000101d.bin
5011e58ab6540a880b3d0b11f1fbe2a7e2753c8676d478f2ddf2f3e5f018a084		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101D 8356 bytes

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