PDF malware analysis — malicious · 518c84ad93caf274

MALICIOUS

PDF

22.8 KB Created: 2011-72-51 03:25:00

MD5: c8e5c7d2d20065bbe9391bf301b01eb5 SHA-1: 9f74425eb289080bdc4d93a55e6e5c2d17a8a181 SHA-256: 518c84ad93caf2743bcc82494b9d4444f94ea9d11b01890c794387276697ef36

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains embedded JavaScript, flagged by multiple heuristics including PDF_JAVASCRIPT and PDF_JS. The presence of a high-severity PDF_EVAL heuristic indicates the use of eval() to execute obfuscated JavaScript, which is further supported by the ML classifier's high confidence score. The extracted JavaScript file, javascript_obj0001_000.js, likely contains the malicious payload. The exact intent of the script is obscured by obfuscation, but its execution is strongly indicated.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

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_obj0001_000.js` `be7c4d72ede1b4615a841b75dd03558f390fb8f1847d0348dfe5caf73321d2f3`	pdf-javascript-stream	PDF /JS object 1 at offset 0x57A2	675 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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