PDF malware analysis — malicious · ed34fe9105031ef2

MALICIOUS

PDF

289.4 KB

MD5: c57f4abc6f621cf9b9c7d8cb8589b930 SHA-1: 3541ed21c5968a6f88f37c8c36ef2d814946d358 SHA-256: ed34fe9105031ef280fffeb8fa2b8bd0312bedf53ee39e1caff711160f63c34d

270 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.003 Windows Command Shell

The PDF file contains a launch action that executes cmd.exe, which in turn appears to be designed to download and execute a second-stage payload. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded script, though obfuscated, suggests a payload delivery mechanism.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

Launch action critical PDF_LAUNCH

PDF contains a /Launch action whose target is an executable, URL, or UNC path — can start an external application
/Launch action target: cmd.exe critical PDF_LAUNCH_COMMAND

PDF /Launch action specifies an executable target — references a known-dangerous executable (cmd, PowerShell, etc.).
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_000482e6.bin` `aedbfeb9ab9f197e717b7b4cdc5636092d218eedaf98fb07a5401cb707d732da`	pdf-embedded-script	PDF decompressed stream script payload at offset 0x482E6	296243 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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