Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bc0eabf2e2f117b…

MALICIOUS

PDF

48.5 KB Authoring application: OpenOffice.org
MD5: 4f1440fdee378f7f55b9f287b1868c8a SHA-1: 2c900271db0e03d85b01d50b2f4f0270a11e5b55 SHA-256: 5bc0eabf2e2f117bfca5b334e1348832b29b51f80b1a5ef9b787fddf3ceb7433
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to other PDF files, disguised as game-related content. This behavior is indicative of a link farm or redirection scheme, likely intended to distribute malware or lead users to phishing sites. The ClamAV detection and ML classifier strongly suggest malicious intent, and the embedded URLs are the primary indicators of compromise.

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.
  • 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://nowator.eu/uploads/1/3/0/6/130604566/gonoxazok-tevunazuxiten.pdf
    • http://thejackquest.com/uploads/1/3/0/5/130590243/520805.pdf
    • http://modejer.smart-standart.ru/uploads/2020/01/28/bcd653c21d0355.pdf
    • http://refugeespeaker.org/uploads/1/3/0/5/130542934/bikuro.pdf
    • http://alessiadana.com/uploads/1/3/0/5/130588780/nepuzelezujidudi.pdf
    • http://beach-music.com/uploads/1/3/0/6/130621163/130621163.html#code+argent+grand+theft+auto+vice+city+ps2

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000113c.bin
cb93c11ace081296ac45d730d13ffbe71ee989d595f1813283d5458c0ecfb7f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x113C 8576 bytes

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