PDF malware analysis — malicious · 32a6581b7556f8fe

MALICIOUS

PDF

7.0 KB

MD5: 1b031ede23cfa58fb9fd061c70927316 SHA-1: 0ec75b1b36ed520138c090bfaa834e15d4c9081d SHA-256: 32a6581b7556f8fee9b0af1bdf156f299e02a6ff5a7d2ef709a820d3d6b8c9df

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. The ML classifier strongly flags this PDF as malicious. The presence of unescape() suggests obfuscation of the JavaScript payload. The extracted artifact 'javascript_obj0009_000.js' is the likely source of the malicious script, which is designed to download and execute a second-stage payload.

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_obj0009_000.js` `aa04575f5cab9297500cbe012050581e7ed946352a098bad910d86c347945806`	pdf-javascript-stream	PDF /JS object 9 at offset 0xD6	5695 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 7 eval/decoder/string-building token(s).

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