PDF malware analysis — malicious · d739459d3bf8b3c3

MALICIOUS

PDF

68.0 KB First seen: 2026-06-10

MD5: 4705fd2a5a4dd484054b76a5eea14af8 SHA-1: d290a6d4ab321fc7623596e328678bede049b758 SHA-256: d739459d3bf8b3c3c6614f88646bf3703894a5b64dbc14ff15fc08127ee37e64

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: `ead52300429e2f1653163f08b2359b84cbde84f030cf7fd16ca2e90ffa27a6f8`
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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