Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6547130864433fd…

MALICIOUS

PDF

44.8 KB Authoring application: Karbon
MD5: a2c4c45fb63bf7a8330e6ddd8e64b42f SHA-1: 0ae7868da87dc82c350e19903353d44bc8788f0d SHA-256: f6547130864433fd0446166997eb10f6e1e69ccd01644c51849749821499a528
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1566.002 Spearphishing Link

The PDF file was flagged by multiple heuristics, including a critical finding for a 'PDF_SEO_LINK_FARM' and ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0'. The document body contains numerous embedded URLs pointing to external PDF files, suggesting a tactic to lure users to potentially malicious content. The ML classifier also strongly indicated maliciousness.

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://michaudwellness.com/uploads/1/3/0/2/130270904/4828464.pdf
    • http://canaiandchai.com/uploads/1/3/0/2/130272381/tozovewivod.pdf
    • http://nashvilleperformancepsych.net/uploads/1/3/0/2/130287808/7384849.pdf
    • http://ccaabasketball.org/uploads/1/3/0/7/130776277/4815366.pdf
    • http://cairokhanhotel.net/uploads/1/3/0/3/130323631/2416340.pdf
    • http://saint-tims.com/uploads/1/3/0/2/130287299/fd0fc5.pdf
    • http://devour-sk.com/uploads/1/3/0/7/130776667/6374018.pdf
    • http://myludingtontherapy.com/uploads/1/3/0/2/130288798/130288798.html#missed+abortion+case+presentation

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001124.bin
9933157681c4b56cfd36c253da14bbd7d1b2dbe60fa2d0957f1840b2aaf66301		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1124 8688 bytes

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