PDF malware analysis — malicious · 4dcb21431e77ec3a

MALICIOUS

PDF

2.7 KB Created: 5892-01-01 Authoring application: 3026

MD5: e2a4013b5bc923491fa934b3f91fe0bb SHA-1: c0c236da0f1a9c5efde43bc7538acda2f2bef9a3 SHA-256: 4dcb21431e77ec3a27b79b39183674c5255df0c3227d542a0180260e7f9ca55f

126 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 Scripting: JavaScript

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating it contains an exploit. Embedded JavaScript, identified by the PDF_JAVASCRIPT and PDF_JS heuristics, is present and likely responsible for the malicious behavior. The extracted artifact 'javascript_obj0013_001.js' is the primary indicator of compromise. The ML_NYX_PDF_MALICIOUS heuristic and the ClamAV detection 'Pdf.Exploit.Agent-36014' strongly suggest this PDF is designed to deliver a payload via JavaScript execution.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

ClamAV: Pdf.Exploit.Agent-36014 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36014
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.
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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0013_001.js` `20c212a1d34132b40cf1ce3eb2a2e88b8ca18044e705e5b933c880ed2a932379`	pdf-javascript-stream	PDF /JS object 13 at offset 0x328	4802 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 10 eval/decoder/string-building token(s). Carved artifact contains 3 long hex-escaped blob(s).

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