Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3b29db515e7ab29…

MALICIOUS

PDF

244.6 KB First seen: 2026-05-10
MD5: 076b0729bf21cd02edf37e49c208ddb5 SHA-1: a371cdbb029e95b7641be93db0856984155eb19d SHA-256: b3b29db515e7ab299cad2dbf0065d4d9f966d544c1f1d36f626a258293ececde
110 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9594

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 8405 bytes
SHA-256: 93e5b850fb11d0b92bcbf7c06dbe8291f9a3cdb787c430d5dbbd22fbb9d9fa01
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 7.52, consistent with packed or encrypted content.