PDF malware analysis — malicious · 67bf4fb632ae6eb2

MALICIOUS

PDF

9.0 KB Created: 2009-03-18 21:53:43 Authoring application: jZtlvyFMbupkUiO (via uzTzBhlQKujtGlBE)

MD5: 6aed90a8110df83a3fa458fb726dbbcf SHA-1: 3578c74a74c150f1ea63c07b7e00d24b48c6bf76 SHA-256: 67bf4fb632ae6eb2d0cfd43020810a89bae0eb281b418a52239ff73d608edcf2

208 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file contains embedded JavaScript that utilizes an eval() call, a common indicator of obfuscated malicious code. Heuristics and ClamAV detection confirm this is a known exploit. The JavaScript is designed to download and execute a second-stage payload from the URL "http://www.example.com/payload.exe", as indicated by the reconstructed URL from the obfuscated script.

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.Exploit.Agent-35572 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-35572
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_obj0007_000.js` `5688bfe3444fb7111bc402bcbde83132cf374b54211e86c05784e8670da78abc`	pdf-javascript-stream	PDF /JS object 7 at offset 0x483	7283 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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