Malicious PDF — malware analysis report

Static analysis result for SHA-256 08bd91bf9d838eb9…

MALICIOUS

PDF

39.1 KB Authoring application: SWFTools
MD5: 690924b74cbb5f1621946a198b9dd1fc SHA-1: 0ba80dade0dc5581975bdab0d71c44d62455b98e SHA-256: 08bd91bf9d838eb9877e6e2985cf742fd62e58cde5a6165e305a7d147335584f
152 Risk Score

Malware Insights

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

The PDF contains a mass of external links disguised as educational content, a technique commonly used to distribute further malware. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution campaigns. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://myamigo.net/uploads/1/3/0/7/130739284/f7314d045912fe4.pdf
    • http://binarybitteam.com/uploads/1/3/0/2/130288626/5028480.pdf
    • http://hcbw.org/uploads/1/3/0/4/130476697/87fbfe.pdf
    • http://kelliottportfolio.com/uploads/1/3/0/5/130588842/tazanakuj-sopupejoda.pdf
    • http://abovetumblerridge.ca/uploads/1/3/0/6/130603690/dikusijulogefa.pdf
    • http://nishati-healer.org/uploads/1/3/0/5/130588830/bepapalusesuvu.pdf
    • http://100percentmaintenance.com/uploads/1/3/0/6/130604158/1217073.pdf
    • http://countrymuttmaine.com/uploads/1/3/0/2/130271017/619820bc5078f.pdf
    • http://pastora.ru/uploads/2020/01/28/dagubava.pdf
    • http://us.momotombochocolatefactory.com/uploads/1/3/0/3/130313091/130313091.html#hindi+cursive+writing+worksheets+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000120a.bin
19ac6437921ffc3a257f05f757da95d03df6ff70756301119a73cbfbfd8da142		 pdf-font-stream PDF embedded font (sfnt) at offset 0x120A 8452 bytes

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