PDF malware analysis — malicious · 52f9d6ffffcee1ea

MALICIOUS

PDF

289.4 KB

MD5: cfda1ac31c6e838d3a674eee7d5564a9 SHA-1: 062bf3f3869ef22ae38f95d8116cca1411308521 SHA-256: 52f9d6ffffcee1ea056c994df9d42e659cf155ab5e02bf70425b1a5704a795a3

210 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF contains an embedded script payload, indicated by multiple high-severity heuristics including PDF_EMBEDDED_SCRIPT_PAYLOAD and ML_NYX_PDF_MALICIOUS. The script is likely responsible for executing malicious commands, as suggested by the presence of cmd.exe and WScript.Shell in the DOC BODY excerpt. The script's purpose is to download and execute a second-stage payload.

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_000482dd.bin` `09dc86ec9e863adfc6183113dbc6c0da47653623f9a07a18a6dc60d8f8cd47c3`	pdf-embedded-script	PDF decompressed stream script payload at offset 0x482DD	296234 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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