PDF malware analysis — malicious · a88934f047e7ff82

MALICIOUS

PDF

289.4 KB

MD5: 9899e55669f133af386665e6fc125f38 SHA-1: 731eee755f17faed67e84b0c6dd694bf053cc7e7 SHA-256: a88934f047e7ff82c23d9a4922b91458cd59199421887f71ea80153f55616de9

210 Risk Score

Malware Insights

MITRE ATT&CK

T1059.003 Windows Command Shell T1204.002 Malicious File

The PDF file contains embedded obfuscated JavaScript, flagged by multiple heuristics as malicious. The script appears to be designed to execute arbitrary commands via cmd.exe, as indicated by the extracted DOC BODY content. This suggests the PDF is a delivery mechanism for a secondary payload, likely aimed at compromising the user's system.

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_000482ec.bin` `69100ea93c8b94b74a4b3ce0478e11dee0962dc1e9bbd80bf0df2ac2b8ab5429`	pdf-embedded-script	PDF decompressed stream script payload at offset 0x482EC	296249 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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