PDF malware analysis — malicious · 0f2c9d1e18fcd9e3

MALICIOUS

PDF

2.8 KB

MD5: 8792f080cd74e1b744978224fa8a0043 SHA-1: 0a6d62c6fe4cd30537ceb09ac4261bf7bebe9ad4 SHA-256: 0f2c9d1e18fcd9e37a1d1379e7a087874c7384f76b50c0823855f08285d5b690

148 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains embedded JavaScript streams that utilize eval() and other obfuscation techniques. The script appears to be designed to download and execute a secondary payload, as indicated by the 'PDF JavaScript exploit cluster' heuristic and the presence of obfuscated code within the embedded scripts. The exact nature of the payload cannot be determined due to truncation and obfuscation.

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_obj0005_000.js` `ec197dcc3acfec708db7194d8e7f4f23e137d69ead9be783288d3ea4dd9e6adc`	pdf-javascript-stream	PDF /JS object 5 at offset 0x117	2315 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`javascript_obj0005_001.js` `4e3679ee7e51b9a1bec8cdc486d5b63bf55e0e31c910c831bf616e117d835101`	pdf-javascript-stream	PDF /JS object 5 at offset 0x117	247 bytes

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