PDF malware analysis — malicious · 6874a2e54116efcb

MALICIOUS

PDF

31.2 KB

MD5: 0e38060560a2822e90262bfe60b95783 SHA-1: 32958867b089c1e73a4f030b21e4e8fd2335023c SHA-256: 6874a2e54116efcb6afd813a0262a1ce3bebec65f6a7a46868aeba491298cab8

146 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 with eval() calls, a common technique for exploiting PDF vulnerabilities. The ML classifier strongly indicates maliciousness. The JavaScript is heavily obfuscated and truncated, preventing a detailed analysis of its specific actions, but it is highly probable that it attempts to download and execute a second-stage payload. The lack of readable document body text and the obfuscated script limit confidence in a more precise family attribution.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

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 (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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0032_000.js` `60b7571864d1fe0b1f1b33fb1fbad8b20d4596a29c17aae3cfabb43f10080d03`	pdf-javascript-stream	PDF /JS object 32 at offset 0x278	3050961 bytes

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