Malicious PDF — malware analysis report

Static analysis result for SHA-256 0223a3dfbe094c3e…

MALICIOUS

PDF

47.5 KB Authoring application: Scribus
MD5: ca43bcd30d9cdfcb4a267242ccf97e32 SHA-1: e50dc6281de4853a51a210ec61dfb462b86905ef SHA-256: 0223a3dfbe094c3e32d0d8053544cf8118fb0e3e5d62a4e3834aeb414d4a8a9d
152 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. The 'PDF_SEO_LINK_FARM' heuristic specifically identified a large number of embedded external PDF links, suggesting a tactic to distribute malware or redirect users to phishing sites. While no scripts were explicitly extracted, the embedded URLs are the primary indicators of compromise.

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://charitysalon.org/uploads/1/3/0/4/130488847/pupuzebo-tapalafa.pdf
    • http://boxclothingco.com/uploads/1/3/0/5/130539238/buridiv.pdf
    • http://406northvbclub.com/uploads/1/3/0/3/130379110/6821929.pdf
    • http://andreagerry.com/uploads/1/3/0/5/130589322/jadeforatuzupokirev.pdf
    • http://calvaryslofamilies.com/uploads/1/3/0/5/130551057/mafigeborilipa.pdf
    • http://nrvikingspiritwear.com/uploads/1/3/0/4/130476850/8924875.pdf
    • http://scripttoscreenplay.com/uploads/1/3/0/5/130551890/jidutimi-benewuse-luvakarobumemet-tebojamezuwa.pdf
    • http://nicolitulk.com.au/uploads/1/3/0/6/130604040/130604040.html#guidelines+live+agenda

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011ad.bin
020d7772b89d0cddbaa98e9f283600f81808192237e25db6cdfb6c5a08754c7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11AD 8880 bytes

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