PDF malware analysis — malicious · 530057a9930fef3d

MALICIOUS

PDF

289.4 KB

MD5: bf515cba839de66e9e55f14d4c9f6e61 SHA-1: 56ffb4ad8459d0fbe0470ab1f68b0b109aba45b2 SHA-256: 530057a9930fef3d689909e4a574c12fdc0bc7879b8f50ec3f2f249fda842559

210 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains an embedded script payload, flagged by multiple heuristics including PDF_LAUNCH and PDF_EMBEDDED_SCRIPT_PAYLOAD. The script appears to be obfuscated but contains commands indicative of executing a file from the temporary directory. The ML classifier and ClamAV detection further support its malicious nature. The primary attack pattern involves leveraging the embedded script to initiate further malicious activity.

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_000482dc.bin` `a099bf0e0b8c08632e85d191d8350132eaacc5189db987075f0bb899876e0c4f`	pdf-embedded-script	PDF decompressed stream script payload at offset 0x482DC	296233 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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