Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e3b01dd2c1d596d…

MALICIOUS

PDF

82.8 KB Authoring application: Karbon
MD5: e812c27710f0f29ffa85b38f28487307 SHA-1: f9c0ad76ad7ab1586a6b4ebf3076b1f225c4b270 SHA-256: 3e3b01dd2c1d596d5c2d570f6ae2aea842634cd57e1eb6b473f9486fc03e581c
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of external links, a common technique for SEO poisoning and phishing lures. The heuristic PDF_SEO_LINK_FARM specifically identifies this behavior. The embedded URLs and the document body, which mentions 'Venous thrombosis treatment guidelines', suggest a phishing attempt to direct users to malicious websites. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further supports the phishing classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9939

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://whitesflooring.com/uploads/1/3/0/6/130621125/3736469.pdf
    • http://stayinghome.nl/uploads/1/3/0/6/130620519/6b2055.pdf
    • http://safedrivingschool.net/uploads/1/3/0/6/130620625/9127871.pdf
    • http://johngeneralconstruction.com/uploads/1/3/0/5/130539243/8244004.pdf
    • http://bsa-sccc-pack301.com/uploads/1/3/0/2/130274098/130274098.html#venous+thrombosis+treatment+guidelines

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001087.bin
d97cf978dba141d6c68de8b103f47ee7dbf5934ab7e01d81cfd81b8aef187ec6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1087 8128 bytes

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