MALICIOUS
210
Risk Score
Malware Insights
MITRE ATT&CK
T1203 Exploitation for Client Execution
T1566.001 Spearphishing Attachment
The PDF file contains an embedded JavaScript payload that is flagged as malicious. This script is configured to launch cmd.exe, a critical system utility, suggesting an attempt to execute further malicious commands or download additional payloads. The presence of a launch action targeting cmd.exe and the ML classifier's high confidence score support this assessment.
Machine Learning
- Nyx PDF Classifier malicious score 0.9999
Heuristics 4
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Launch action critical PDF_LAUNCHPDF contains a /Launch action whose target is an executable, URL, or UNC path — can start an external application
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/Launch action target: cmd.exe critical PDF_LAUNCH_COMMANDPDF /Launch action specifies an executable target — references a known-dangerous executable (cmd, PowerShell, etc.).
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Embedded script payload in PDF stream high PDF_EMBEDDED_SCRIPT_PAYLOADPDF 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.
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Suspicious extracted artifact medium EXTRACTED_FILE_STATIC_TRIAGEOne 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_0003cc93.bin3871464e13411c750c3476c2de761dfe84f057f42b79b9613c8072d253258465 |
pdf-embedded-script | PDF raw stream script payload at offset 0x3CC93 | 248960 bytes |
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Detection
ClamAV:
No threats found
Obfuscation or payload:
likely
Carved artifact contains 2 shell/COM execution token(s).
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