PDF malware analysis — malicious · 67e0ca602656090a

MALICIOUS

PDF

289.4 KB

MD5: e3ef0e082d8f75172db24dcb45ece547 SHA-1: caf59a6a5913abe43c860cf0ab0a588353818270 SHA-256: 67e0ca602656090add521d59863e0c600a0ccd4f295bc6387b11b27957c9729d

210 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains an embedded script payload, indicated by the PDF_EMBEDDED_SCRIPT_PAYLOAD heuristic. The script itself appears to be obfuscated but the presence of a launch action and the ML_NYX_PDF_MALICIOUS classification strongly suggest it is designed to download and execute a secondary payload. The CLAMAV_DETECTION heuristic further supports its malicious nature.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 4

Launch action critical PDF_LAUNCH

PDF contains a /Launch action whose target is an executable, URL, or UNC path — can start an external application
ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
Embedded script payload in PDF stream high PDF_EMBEDDED_SCRIPT_PAYLOAD

PDF stream bytes contain script execution markers such as ActiveXObject/CreateObject, WScript.Shell, PowerShell, or shell-exec primitives. This is stronger than ordinary PDF JavaScript because it indicates a staged external script payload hidden in stream bytes.
Suspicious extracted artifact medium 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
`embedded_pdf_script_000482db.bin` `571edce5c5758c1a35739373ba0ebfdc85189f975e73dd76ba90a8e3b6d127b6`	pdf-embedded-script	PDF decompressed stream script payload at offset 0x482DB	296232 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 shell/COM execution token(s). Carved artifact contains 1 long hex-escaped blob(s).

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