PDF malware analysis — malicious · ff8739d208658e13

MALICIOUS

PDF

68.0 KB First seen: 2026-06-09

MD5: 385f0e6253892fb68a2d232912be391e SHA-1: 3695fa5e4ee2a8ffa285b4adb2e1130d1d5af8e0 SHA-256: ff8739d208658e13c22f9c7b2ce6db0be285f6e7e821e98b467c23eb63c2f08e

130 Risk Score

Machine Learning

Nyx PDF Classifier malicious score 0.9952

Heuristics 2

Base64-encoded Windows executable payload in PDF critical PDF_BASE64_PE_PAYLOAD

PDF text contains a long base64 blob that decodes to a verified Windows PE executable. This catches payloads hidden after EOF, inside comments, or in plain text outside normal PDF streams.
Suspicious extracted artifact high 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.

Filename	Kind	Source	Size
`base64_pdf_pe_00000284.exe`	embedded-pe	PDF raw base64 PE payload at offset 0x284	51712 bytes
SHA-256: `bf5ca25f31d13fa09fff3bfa2357c117b324e15ec98d8a5beafc239dc89ee9aa`
Detection ClamAV: No threats found Obfuscation or payload: likely actual_type=PE; declared_or_context_type=PDF; filename=base64_pdf_pe_00000284.exe; kind=embedded-pe Static shellcode analysis recovered command string(s): PowerShell

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