Malicious PDF — malware analysis report

Static analysis result for SHA-256 0476cbde64684e1b…

MALICIOUS

PDF

36.3 KB Authoring application: Solid Converter PDF
MD5: 99de03c515e3bf7d6f7d7817e0b2eaec SHA-1: 47df41713df0c50b475dcf8ba6b45677d85d612f SHA-256: 0476cbde64684e1b6cccc9ea05304d9cf1cdc05ec20aaad72e738dec9fec5939
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 external PDF files, a technique commonly used for SEO poisoning and distributing malware. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as phishing. The document body, though partially corrupted, references 'Delaware annual report form pdf', suggesting a lure to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://mvstuff.com/uploads/1/3/0/2/130287278/2427253.pdf
    • http://costamedicalmarijuana.com/uploads/1/3/0/2/130271255/411ebb67d5b.pdf
    • http://yasr.com/uploads/1/3/0/6/130639678/32b32516.pdf
    • http://newmillerdam.org/uploads/1/3/0/2/130271224/pebuvu.pdf
    • http://shardexplorers.com/uploads/1/3/0/3/130313218/130313218.html#delaware+annual+report+form+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00000fa0.bin
98ee0fd59e09f2cc861cf2204ae44d8f6c324717fef4991947f90ba483154622		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA0 7964 bytes

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