Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3093410dc8fa387…

MALICIOUS

PDF

28.7 KB Authoring application: Karbon
MD5: 97257e8182d53403dfd4c2f82b67097c SHA-1: 42c396705d9e347b587de97b3daa5a3f52610cdc SHA-256: d3093410dc8fa3877484de142ebd5040ebc67a6e14bac58b28327e5635c8f738
150 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to other malicious PDF files, masquerading as cybersecurity training. The heuristic PDF_SEO_LINK_FARM specifically identifies this behavior, and the ML classifier strongly supports a malicious verdict. The embedded URLs are the primary indicators of compromise, facilitating the download of 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.
  • 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://elementhomeaudio.com/uploads/1/3/0/4/130435697/2214305.pdf
    • http://msspadc.net/uploads/1/3/0/4/130476043/tupobagefoxedofini.pdf
    • http://chainznthingz.com/uploads/1/3/0/6/130621357/texij.pdf
    • http://dancinggoatsanctuary.com/uploads/1/3/0/6/130604690/130604690.html#cyber+security+fundamentals+training+army+answers

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00000f90.bin
a300c447c7143b2ef6129f5a5a93257e90c04ebee0e2e05a3bdf3023df30aa00		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF90 7948 bytes

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