PDF malware analysis — malicious · 08a3dc9db9445067

MALICIOUS

PDF

289.4 KB

MD5: 8ed2b8a2224010d8ea1aaca0f304da57 SHA-1: 131990a8b4606775668cb3be6035f967d6aeb309 SHA-256: 08a3dc9db94450676346e2eede3f3ec3773003258aba21024bc1ff118a8900ca

210 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file contains an embedded script payload, indicated by the PDF_EMBEDDED_SCRIPT_PAYLOAD heuristic and confirmed by the extracted artifact. The script is likely designed to download and execute a secondary stage, as suggested by the PDF_LAUNCH action and the ML_NYX_PDF_MALICIOUS classification. The presence of obfuscation and script execution terms in the static triage further supports this 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_000482d8.bin` `758865cadb12e477759b0d53c643eedf1b6ecc362f13fccec1bc0e2908b7b036`	pdf-embedded-script	PDF decompressed stream script payload at offset 0x482D8	296229 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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