PDF malware analysis — malicious · 43b06c634370abde

MALICIOUS

PDF

11.2 KB

MD5: e09e048676bb9eff9fa534f914f6cb3b SHA-1: feb2c2211723dbf8ec3d1eddedaca65b4e6c398c SHA-256: 43b06c634370abde8469265e449b5e96f21297f9a4f3a9297441eb404fa1ed20

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_NYX_PDF_MALICIOUS classifier strongly suggests malicious intent. The JavaScript stream, identified as 'javascript_obj0007_000.js', is obfuscated and likely responsible for downloading and executing a second-stage payload. The presence of unescape() further supports the obfuscation technique.

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` `581254f419619a027e71745bdbb4ec21f9e1010cff5958454745eb1004e94ea0`	pdf-javascript-stream	PDF /JS object 7 at offset 0x233	48705 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 274 eval/decoder/string-building token(s).

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