Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a9afc0ea5678b3d…

MALICIOUS

PDF

44.6 KB Authoring application: Mobipocket Creator
MD5: 9f1e0b28122e11cccb1ae9bcb5f8c395 SHA-1: 1c9b4d283c9b37825e6897e516a4c81fed1fec21 SHA-256: 3a9afc0ea5678b3d02234faeb8061e4184777b8289ecb5cc12ffe49be27fbcbe
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded external links, a technique commonly used in SEO poisoning and phishing attacks to direct users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent. The heuristic PDF_SEO_LINK_FARM specifically identifies the mass external link farm as the primary malicious characteristic.

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://ryanmecheski.com/uploads/1/3/0/5/130543468/nurejil.pdf
    • http://jjbeef.com/uploads/1/3/0/4/130483270/widoko.pdf
    • http://petradesigns.net/uploads/1/3/0/6/130605048/zagavoposeb.pdf
    • http://richmondtirerepair.com/uploads/1/3/0/7/130776169/6963253.pdf
    • http://plumislandweavingco.com/uploads/1/3/0/2/130289288/8062370.pdf
    • http://equipajedemano.com/uploads/1/3/0/5/130588787/dubap.pdf
    • http://michelehrose.com/uploads/1/3/0/5/130589004/3291555.pdf
    • http://mintersgalaxy.com/uploads/1/3/0/5/130590312/nokizabegikobo_tovejusa_raniwolomot_gefopoxozajon.pdf
    • http://acupuncturehilohawaii.com/uploads/1/3/0/5/130543468/vililugirofuvo.pdf
    • http://absystemsllcscam.com/uploads/1/3/0/2/130274315/130274315.html#cell+structure+components+and+functions+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000123a.bin
afda87ad6f27ab718f6258bced70abbaa1d482d807c21f2c2240265e505e53a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x123A 8652 bytes

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