PDF malware analysis — malicious · d568d0d302b2519a

MALICIOUS

PDF

11.0 KB

MD5: d9b8e5050fba726073d9e0726447f478 SHA-1: f1b3615dc7aaed4d48c63c4511ebfafc5e726dc4 SHA-256: d568d0d302b2519a4b68ca72b65e500110b6a45b41583628edfd1c0bd66fdab0

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file was flagged as malicious by an ML classifier and contains embedded JavaScript. The JavaScript stream is obfuscated, indicated by the 'unescape()' call and 'Script obfuscation indicators' heuristic. This obfuscation suggests an attempt to hide malicious code, likely for downloading and executing a second-stage payload. The presence of PDF_JAVASCRIPT and PDF_JS heuristics further supports the malicious nature of the embedded 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` `b65787ea31aa7494e719c546ca1aee2553712b3c3fb4b1a49fd187c83d23ffe5`	pdf-javascript-stream	PDF /JS object 7 at offset 0x233	48652 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 241 eval/decoder/string-building token(s).

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