Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b780f7a890653e6…

MALICIOUS

PDF

36.6 KB Authoring application: Mobipocket Creator
MD5: 6c9a5346d9a66c78beb7b3eda97317bf SHA-1: 9c39cd00ecbfb49647dc48fcda6e40886e4018ea SHA-256: 0b780f7a890653e65312c02df8077ea73bdca7b2a49dbc186198b43afc5bd687
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs pointing to external PDF files, a technique often used for SEO spam or to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as phishing. The embedded URLs are the primary indicators of compromise, suggesting a campaign to drive traffic to these external resources.

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://ontherolljoplin.com/uploads/1/3/0/5/130543333/9780569.pdf
    • http://nylsremodelingcorp.net/uploads/1/3/0/6/130620767/6f61ebd97cff.pdf
    • http://tattyscoins.co.uk/uploads/1/3/0/5/130551049/e128a.pdf
    • http://clearorm.com/uploads/1/3/0/2/130273896/f47767c4.pdf
    • http://msb-art-integration.com/uploads/1/3/0/3/130379488/6148892.pdf
    • http://iknowschmidt.com/uploads/1/3/0/6/130621826/9343122.pdf
    • http://vivagot.repuljvelunk.website/uploads/2020/01/28/lidaz_vixaxuverugatag.pdf
    • http://cccvancouver.com/uploads/1/3/0/5/130546497/8546426.pdf
    • http://davidmarquesibanez.com/uploads/1/3/0/4/130483745/130483745.html#jobs+vocabulary+exercises+printable

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011aa.bin
a2c410e05c01aab85535ab2901271134411523573caf84e8f4fe185e07a93f90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11AA 8776 bytes

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