PDF malware analysis — malicious · afbe29b67667949f

MALICIOUS

PDF

150.9 KB

MD5: e67f0f4a0c52d8492de26961aba1bef6 SHA-1: 77605a46873c24b93dea903a7a096f2d84dd2946 SHA-256: afbe29b67667949f9176336eb18146bde0326c3b2a0573f93654354caa2d0ab4

94 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file was flagged by an ML classifier as malicious and contains a VBScript-style decimal byte array that decodes to a PE payload. This indicates the document is designed to drop and execute a malicious executable. The extracted PE payload has a SHA256 hash of b3f7ae0b07c58dff850f09ab1b75c63430d3b18c88c5b1f7ac385e21bc5bd460.

Machine Learning

Nyx PDF Classifier malicious score 0.9977

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 info 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
`decimal_array_pdf_pe_00000229.exe` `b3f7ae0b07c58dff850f09ab1b75c63430d3b18c88c5b1f7ac385e21bc5bd460`	embedded-pe	PDF raw comment decimal-array PE payload at offset 0x229	21896 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.84, consistent with packed or encrypted content.

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