Malicious PDF — malware analysis report

Static analysis result for SHA-256 74d45a91adde7a80…

MALICIOUS

PDF

96.0 KB Authoring application: Inkscape
MD5: 7ac53c7b76ceb4e54d8a95410902235b SHA-1: 89c6fd4b44b867a7d77caa3577663231677aa086 SHA-256: 74d45a91adde7a8006150169ee7cfb3ae712872f3fa83dde03aaf09540eceafd
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to other PDF files, masquerading as a repair manual. This technique is commonly used to distribute malware or lead users to phishing sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://nuggwholesale.com/uploads/1/3/0/6/130621019/6435220.pdf
    • http://threedeetwodee.com/uploads/1/3/0/4/130488934/8366861.pdf
    • http://ccmclb.com/uploads/1/3/0/6/130620389/2408181.pdf
    • http://nomadicpeople.org/uploads/1/3/0/6/130639540/6846691.pdf
    • http://nutgraf.ca/uploads/1/3/0/7/130740191/pobasiditevife.pdf
    • http://mohairregrowthsystem.com/uploads/1/3/0/6/130620412/8647627d7f749b8.pdf
    • http://s-w-p.org/uploads/1/3/0/7/130739887/eba366997216.pdf
    • http://mytridentestates.com/uploads/1/3/0/2/130291975/67f82fba7.pdf
    • http://dothedavey.com/uploads/1/3/0/3/130324027/nogexegigul.pdf
    • http://thesingbabysingshow.com/uploads/1/3/0/2/130288939/130288939.html#1998+buick+century+repair+manual+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011fd.bin
f4289270af371b206bf1467452833f968da5b4282719bb03f5c46c055b75e938		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11FD 8144 bytes

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