PDF malware analysis — malicious · 241356d5044da6cd

MALICIOUS

PDF

10.6 KB

MD5: 27b34c60bcab9583451f5be6fb39be84 SHA-1: bf75837413daad0979b95b00c3df3fd44d65472e SHA-256: 241356d5044da6cd90b58a56a4872468dbc46fbe2478b422153d1f1c29701093

90 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 flags this PDF as malicious. The embedded JavaScript stream, named 'javascript_obj0007_000.js', is likely responsible for the malicious behavior, potentially downloading and executing a second-stage payload. The use of unescape() further suggests obfuscation of malicious code within the script.

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` `a911d943cacf17aa449616331f8508263320709bdbbfd900ae2cc0d30e6a86e2`	pdf-javascript-stream	PDF /JS object 7 at offset 0x233	47003 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 248 eval/decoder/string-building token(s).

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