Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3446cddca9ffbe5…

MALICIOUS

PDF

244.6 KB First seen: 2026-05-10
MD5: 5a2beb01737b98c3e4f988cd5cb46fce SHA-1: b5eddfad57f6c88f26276e6df9b702f6a98fa71c SHA-256: a3446cddca9ffbe5915c5a014444fbcf2fe829ec6c4c15c1a05c3d6f273848b2
110 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.6526

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 13383 bytes
SHA-256: 245c0389a30a037a575eb5a8856ab6b7fae829cb6a973dcbe967d6f1f4ea442e
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 7.71, consistent with packed or encrypted content.