PDF malware analysis — malicious · ee8b19702d453f7b

MALICIOUS

PDF

11.0 KB

MD5: ca05d0c5c8f2122226cd86edef90380b SHA-1: 9ffc433b400c4dbd07b283eacfb1ccb7739697c4 SHA-256: ee8b19702d453f7b3989f2811c4c763d0e7c3a4d81524c4c249f4038215b7485

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF file was flagged as malicious by a machine learning classifier and contains embedded JavaScript. The JavaScript stream, identified as 'javascript_obj0007_000.js', was obfuscated and likely used to download and execute a second-stage payload. The presence of JavaScript actions and unescape calls within the PDF structure further supports this conclusion.

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` `a9dd7324e4744bed9a2ce2a38090c3bb5dcf6130cf6a6573f10efc41cb60c7de`	pdf-javascript-stream	PDF /JS object 7 at offset 0x233	48901 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 258 eval/decoder/string-building token(s).

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