PDF malware analysis — malicious · cd0fcd3b00a7be59

MALICIOUS

PDF

289.4 KB

MD5: cae4f38eb00d5faa9026e4d2c42a1c94 SHA-1: ccccefec50396d8b3b6105d3474e561440a9234f SHA-256: cd0fcd3b00a7be599d373d76650d272752e8522df4ba5d1373524f4a22c54256

210 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF contains a launch action and an embedded script payload, flagged by multiple heuristics including ClamAV and an ML classifier. The embedded script, when partially reconstructed from the DOC BODY, indicates it attempts to execute commands via cmd.exe and WScript.Shell, likely to download and run a second-stage payload from a location specified within the script. The specific command line suggests obfuscation and use of environment variables.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

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: Pdf.Dropper.Agent-7305163-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7305163-0
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_000482e6.bin` `14365a5fe7c9e4dd5cddc651671f0bbc1fc3f879655db2205f5ae4a6e3496d06`	pdf-embedded-script	PDF decompressed stream script payload at offset 0x482E6	296244 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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