PDF malware analysis — malicious · d00ea8a26fce0e15

MALICIOUS

PDF

802 B

MD5: e5d318363e323affe066ca62c86abce0 SHA-1: 9af2802c1e0f35fdf3eb603cbc3f5be7e2d53efb SHA-256: d00ea8a26fce0e151e0cb16014f3643a10736e78c89edad5439eb2b734c326df

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The ML classifier strongly suggests maliciousness. The unescape() function is used, which is often employed to deobfuscate malicious JavaScript. While the specific JavaScript code was not fully detailed, its presence and obfuscation suggest it's designed to download and execute a second-stage payload. No document body text was available for analysis.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 4

unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (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_obj0005_000.js` `e5d4401bd87db548e8015286a55b2c4db4c133b1e69997c32d1ab08c2d69daf0`	pdf-javascript-stream	PDF /JS object 5 at offset 0x156	280 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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