Malicious PDF — malware analysis report

Static analysis result for SHA-256 a05b27386ddc1ab1…

MALICIOUS

PDF

69.4 KB First seen: 2026-06-11
MD5: c8c759a79c0f40d268b8f49c3c9c4d60 SHA-1: ea00d67d34cfc60353c726312545582bd9117126 SHA-256: a05b27386ddc1ab11d8ef518a914e4ad3623709c83589f4c7f5ff9a32074d597
130 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

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.

FilenameKindSourceSize
base64_pdf_pe_00000284.exe embedded-pe PDF raw base64 PE payload at offset 0x284 52736 bytes
SHA-256: 89d98a06cb990cafabf2ba5e400089e87460afdbe0bd4a0abda43a73513e1419
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 found candidate code region(s). Indicators: SC_PUSH_STRING, SC_STR_VIRTUALALLOC, SC_STR_POWERSHELL Static shellcode analysis recovered API/import strings: VirtualAlloc, VirtualAllocEx, WriteProcessMemory, CreateRemoteThread, OpenProcess Static shellcode analysis recovered command string(s): PowerShell