Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc34c9f5bc265400…

MALICIOUS

PDF

114.2 KB First seen: 2026-05-10
MD5: 7b785557529c5cfe94c841ab4630a83b SHA-1: bb4459f5815163374090dbd4d0e1699af9c83ced SHA-256: bc34c9f5bc2654005bbfa4d248bbe51c911ac8ee736c551500d3f095d2effaae
110 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 16559 bytes
SHA-256: 704008c597b843d6e80229f06217d1db7d56d222e40de379d8f5af9f0325c247
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 7.78, consistent with packed or encrypted content.