Malicious PDF — malware analysis report

Static analysis result for SHA-256 79f00b49b9678b7f…

MALICIOUS

PDF

37.5 KB Authoring application: Karbon
MD5: 19f615c388dc82ffa5b82871d2ddccb1 SHA-1: e674817028cff2485595a627ba97d89c6657ece8 SHA-256: 79f00b49b9678b7f516fd5c477cfd9118e1d03a304adf5f3976199b04a29a3ec
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to external PDF files, a technique often used for SEO manipulation or to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a mechanism for redirecting users to potentially harmful content.

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://superdraya.com/uploads/1/3/0/7/130740385/6eefccf882.pdf
    • http://krisandandreawedding.com/uploads/1/3/0/6/130603740/vibunojukojimaz-vojuxetuf.pdf
    • http://martinezseafood.net/uploads/1/3/0/6/130620427/sikefefululiriv_nagufebabej_romajoxiwitit_nelov.pdf
    • http://bostercastle.com/uploads/1/3/0/2/130274376/veluxof.pdf
    • http://kevinmellobook.com/uploads/1/3/0/6/130640133/jifawediwi-punuwoxu-zelisarurejut-kurifit.pdf
    • https://matupuvizixem.weebly.com/uploads/1/3/0/5/130590618/fovek.pdf
    • http://uinivest.com/uploads/1/3/0/5/130589145/merosofakez.pdf
    • http://nashobavalleyextractco.com/uploads/1/3/0/5/130541208/130541208.html#thermax+double+effect+absorption+chiller+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011a0.bin
3c0d616cdd4dd2b23a72ccb91ba959535d5f804a745b31eb163846f68c987d93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A0 8392 bytes

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