PDF malware analysis — malicious · e5d3f9529cb83470

MALICIOUS

PDF

69.5 KB

MD5: 2a5d46410eecfd08b9dc845bf875e377 SHA-1: 2c00fa56df072347075ed4c969448902291aa6bc SHA-256: e5d3f9529cb834708788944bb18ca3ec124484f3cf80d254e1099d20329c95e3

100 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1055.012 Process Injection: Process Hollowing

The PDF document contains a Base64-encoded Windows executable payload, identified by the PDF_BASE64_PE_PAYLOAD heuristic. This payload is likely designed to be decoded and executed using process injection techniques, as indicated by the presence of APIs like VirtualAllocEx, WriteProcessMemory, and CreateRemoteThread. The ML classifier also strongly suggests maliciousness.

Machine Learning

Nyx PDF Classifier malicious score 0.9952

Heuristics 1

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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`base64_pdf_pe_000002fe.exe` `cac25a0c85ff0522a7105b86ac53326b6c5a8b9031d9ab76d5f39249c561bd20`	embedded-pe	PDF raw base64 PE payload at offset 0x2FE	52736 bytes

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