Malicious PDF — malware analysis report

Static analysis result for SHA-256 245f6d9c3a962402…

MALICIOUS

PDF

244.6 KB First seen: 2026-05-11
MD5: 987d7cbbcf3ced8cbe1ff70c56896bcb SHA-1: dda579bce5a688e23e3bcd23c1e60f200d6c40bf SHA-256: 245f6d9c3a962402c8637017d0a84511cd0fcbdbaa443aad322298d19e1fd231
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 22738 bytes
SHA-256: 1e78f5aeb1a372b473e95131cde0960481be722f4a10706ac6bea53e9ccb28ac
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 7.85, consistent with packed or encrypted content.