PDF malware analysis — malicious · 572033f16c0808ce

MALICIOUS

PDF

16.1 KB

MD5: bb5b90bc13b91ec5df5d1dd0cdf68d7c SHA-1: 92b6eb99ed9d92d065b88c4d7d62813c6facddd2 SHA-256: 572033f16c0808cef4b8d8a9a24eeaa6efdf5204c5ebe54ebb128b9885d326d2

108 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for obfuscated objects and an ML classifier indicating maliciousness. An embedded JavaScript stream was extracted, which is highly suspicious. The presence of JavaScript actions and embedded JS streams strongly suggests the document is designed to execute malicious code. The primary attack pattern involves leveraging the embedded JavaScript to download and execute a secondary payload, likely leading to further compromise.

Machine Learning

Nyx PDF Classifier malicious score 0.9924

Heuristics 4

ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
JavaScript action low PDF_JAVASCRIPT

PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Suspicious extracted artifact info 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
`javascript_obj0006_000.js` `10b6d8e05ceb129dc304cd6c7d9b5173bee7eba60b26048b979ce1985f002fbd`	pdf-javascript-stream	PDF /JS object 6 at offset 0x19C	17209 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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