PDF malware analysis — malicious · a80db0e18ed5aa40

MALICIOUS

PDF

289.4 KB

MD5: ebcd969a723470fcd618bb5d5748b3a0 SHA-1: 0200eb4e9f03bbc331965f64d4e4e6a3876df8de SHA-256: a80db0e18ed5aa406a6edb9205cf245d3ab8042397e1e8da31044325f595f7b1

212 Risk Score

Malware Insights

MITRE ATT&CK

T1059.003 Windows Command Shell T1204.002 Malicious File T1071.001 Web Protocols

The PDF contains a launch action and an embedded script payload, flagged by multiple heuristics including ML and ClamAV. The embedded script, when executed, appears to construct a command line that uses cmd.exe to download and execute a second-stage payload from a URL, likely within the user's temporary directory. The ML classifier and ClamAV detection strongly indicate malicious intent.

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_000482e6.bin` `5493c371bcf3f65f9479fe59707e25dbc4f56edc9671f2d8854a2af329995cbf`	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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