PDF malware analysis — malicious · 460303021216c408

MALICIOUS

PDF

289.4 KB

MD5: 343346c050abcbcb29818adb9a2ef955 SHA-1: 3eabb91a7d3d4c417d2a7afea404db786a74af3c SHA-256: 460303021216c4089ad2d41e101900947dba70cbb472906a5bf85c3b9b242bff

210 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF contains embedded script content, indicated by the PDF_EMBEDDED_SCRIPT_PAYLOAD heuristic. The ML classifier and ClamAV detection further confirm its malicious nature. The extracted script command line suggests it attempts to download and execute a second-stage payload, likely from a remote source, using cmd.exe and WScript.Shell.

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_000482eb.bin` `5fac8978378ac5533699c7972f6af2bff19b379f4ce0da1eef4c82d881b030fd`	pdf-embedded-script	PDF decompressed stream script payload at offset 0x482EB	296248 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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