PDF malware analysis — malicious · 8f3513077c946ec9

MALICIOUS

PDF

1.95 MB Created: 2011-72-51 03:25:00

MD5: ba5cc03f335e1c1427c5c01567910535 SHA-1: c244d0984b1b52713e8425fbe43dccaf47ad5b15 SHA-256: 8f3513077c946ec907d4617ee6c1055d002dc8637663d62259728d11b24126ac

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 Command and Scripting Interpreter: PowerShell T1059.003 Command and Scripting Interpreter: Windows Command Shell T1059.007 Command and Scripting Interpreter: JavaScript/TypeScript

The PDF contains embedded JavaScript, flagged by multiple heuristics including PDF_JAVASCRIPT and PDF_JS. The JavaScript stream includes an eval() call, indicating obfuscated code execution. The ML classifier strongly suggests maliciousness. The primary intent appears to be downloading and executing a second-stage payload, as suggested by the obfuscated JavaScript.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 4

eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (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_obj0001_000.js` `257b928525e68e51e96f451a5b916d994b252502ff3f0b29dd263c043a108576`	pdf-javascript-stream	PDF /JS object 1 at offset 0x6277	547 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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