PDF malware analysis — malicious · aa999bf833721b5a

MALICIOUS

PDF

10.3 KB

MD5: 1bafeeb880ee1883986a3e81f1a8c7a3 SHA-1: 8eda9ed9d88f1ca6363185e6cef121ca827f8d01 SHA-256: aa999bf833721b5afe06041f7562e92bf621ff1fc40cfb065b44347ba55a2027

90 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The ML classifier strongly flags this PDF as malicious. The unescape() call suggests obfuscation of the JavaScript payload. While no specific URLs or hashes were extracted, the presence of obfuscated JavaScript points to a downloader or exploit delivery mechanism.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

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_obj0007_000.js` `c51db22767e905633dc844b5a10edb76c0c77ac1022e7d0d29269714850d6716`	pdf-javascript-stream	PDF /JS object 7 at offset 0x233	46979 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 226 eval/decoder/string-building token(s).

Open this report in the interactive analyzer, or submit your own file for analysis.