PDF malware analysis — malicious · 89cfe14742174e29

MALICIOUS

PDF

289.4 KB

MD5: 1bf3bfc6418bc219e0706836c0409b38 SHA-1: 48b67c3fb412177fafd963b25c2eea58ea6de422 SHA-256: 89cfe14742174e29b33fa9cd72add942dfb3090b7219b979525e2b73fea4ed37

210 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF document contains an embedded script payload, as indicated by multiple high-severity heuristics including PDF_EMBEDDED_SCRIPT_PAYLOAD and ML_NYX_PDF_MALICIOUS. The PDF_LAUNCH heuristic further confirms that the document is configured to execute an action. The embedded script, named embedded_pdf_script_000482e1.bin, is likely responsible for the malicious activity, potentially downloading and executing a second-stage payload. The DOC BODY excerpt suggests the script may involve PowerShell commands for file operations and environment variable expansion.

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_000482e1.bin` `f6a69825a41db70b4a20701d367a3d356f1edde77a84564880dd257564e3dc52`	pdf-embedded-script	PDF decompressed stream script payload at offset 0x482E1	296238 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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