PDF malware analysis — malicious · 496a2938bfd3b1ba

MALICIOUS

PDF

289.4 KB

MD5: 3a8a911a8b93f0b420575363f129eda3 SHA-1: 4ae45a5bf70b431c6041b2b49d134175d6b2767e SHA-256: 496a2938bfd3b1bae039bd447f7f0875bb4192291e40714595caac917e629f33

210 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF contains embedded script content that is obfuscated and appears to be designed for execution. The script uses cmd.exe to construct and execute a command, likely to download and run a secondary payload. 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_000482d7.bin` `b57e4508276e03387ed5a0718a47ec9de43c3a3dd20b9b88479ad953cc3aee80`	pdf-embedded-script	PDF decompressed stream script payload at offset 0x482D7	296226 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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