PDF malware analysis — malicious · 07fecffb54aa27dd

MALICIOUS

PDF

25.8 KB Created: 2006-02-01 14:14:12 Authoring application: Wegoptyr (via HghTc6Fs)

MD5: 2bada6259c62dd82bfa3f775ac20b05b SHA-1: 4b3edb72b9f885247525aad64a86946db3a56a2e SHA-256: 07fecffb54aa27ddb7babc56897a9df870f3dc7713b37378290f4f0c4975757f

148 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript streams that utilize eval() for obfuscated code execution. This strongly suggests the script is designed to download and execute a second-stage payload. The ML classifier and exploit cluster heuristics further support the malicious nature of the sample. No specific family could be identified due to the obfuscation and lack of unique indicators.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

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.
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `34d9422db36d695d8fa37360fa034fb2cc0b9f2eb0de19c63ffaf111b78d97c0`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1EE	25300 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`javascript_obj0007_001.js` `a66ac8d4aaa29e42be9bac6d74426b07b929c0fb89ec465c57b609f4335f4e6c`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1EE	25037 bytes

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