Malicious PDF — malware analysis report

Static analysis result for SHA-256 c888f3fd3462c7aa…

MALICIOUS

PDF

244.6 KB First seen: 2026-05-11
MD5: be5723f6ddedb5181bea4d83b771bf4b SHA-1: c4678aae415ccbd5de8df378aacd713dfe7465db SHA-256: c888f3fd3462c7aacefa1844ff0a4c87cd2e7fb4e341fcfcaf5cafb759639941
110 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 2

  • VBScript-style decimal byte array decodes to a PE payload critical PDF_VBS_DECIMAL_ARRAY_PE_PAYLOAD
    PDF comment text contains a VB/VBScript-style decimal byte array, such as c(077),c(090), that decodes to a verified Windows PE executable. The rule is gated on a comment-line Array(c(...)) assignment and a valid MZ/PE header to keep false positives low.
  • Suspicious extracted artifact medium EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
decimal_array_pdf_pe_00000229.exe embedded-pe PDF raw comment decimal-array PE payload at offset 0x229 31617 bytes
SHA-256: 6a8b7f568115d31bafaa0e6456d827088f0fe80f4125c17193d9e6b12d25ffda
Detection
ClamAV: No threats found
Obfuscation or payload: likely
actual_type=PE; declared_or_context_type=PDF; filename=decimal_array_pdf_pe_00000229.exe; kind=embedded-pe Carved artifact entropy is 7.90, consistent with packed or encrypted content.