PDF malware analysis — malicious · dc446608fb93d480

MALICIOUS

PDF

10.1 KB

MD5: 05d3fa4f0ceb700e77b9b84ac3a8f071 SHA-1: f2e3ee772a7c37bccc4a221224ebdeba7a636996 SHA-256: dc446608fb93d48075df6c4e7a79b254a777adeccdfa5f520e4142040b061c3e

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded, obfuscated JavaScript. Heuristics indicate the use of unescape() and ML classification strongly suggests malicious intent. The JavaScript stream, named 'javascript_obj0007_000.js', is likely responsible for downloading and executing a secondary payload, which is a common technique for initial access.

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` `c2649f910de0da2bef82ba157d52881df0d5364bb4f0a980818fa86a218000e4`	pdf-javascript-stream	PDF /JS object 7 at offset 0x233	46195 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 222 eval/decoder/string-building token(s).

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