PDF malware analysis — malicious · 6a53084d5ed1aa22

MALICIOUS

PDF

1.3 KB

MD5: 61f2e2a576fc4e4e534078679d8e18ba SHA-1: 235b1fd25993fd68e8d5c3dca4e0f5e9a34f22eb SHA-256: 6a53084d5ed1aa22b8b63d7c53d88c06c710344fe236c6bf5289e5e6f0a58d9e

208 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript that utilizes an eval() call, indicating an attempt to execute malicious code. Heuristics and ClamAV detection confirm this is a dropper, likely designed to download and execute a second-stage payload. The specific JavaScript code is heavily obfuscated, but the presence of exploit cluster signals and the 'Pdf.Dropper.Agent-7269373-0' ClamAV signature strongly suggest a malicious dropper functionality.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 6

PDF JavaScript exploit cluster critical PDF_JS_EXPLOIT_CLUSTER

PDF combines an executable JavaScript/action surface with exploit staging indicators such as eval/unescape/fromCharCode, XFA script content, or a related CVE pattern. Benign form JavaScript remains low-severity, but this correlated cluster is high-confidence malicious behavior.
ClamAV: Pdf.Dropper.Agent-7269373-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7269373-0
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
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_obj0009_000.js` `2c6bbf9057160b70b7a0f5f38ff842f89e2afa28d2f4a1d6581af780931c9fbc`	pdf-javascript-stream	PDF /JS object 9 at offset 0xD6	2704 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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