PDF malware analysis — malicious · 9aaaaecf23a16551

MALICIOUS

PDF

2.8 KB

MD5: feb5f201648a27d6ffcea505a89f2101 SHA-1: 706c7ccb708dbfbfa4430556ff2cf76ec25bb5d8 SHA-256: 9aaaaecf23a165519250a38123a5c362178882e29405a58ebca3ffe9f51c33cd

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains embedded JavaScript, including a call to eval(), which is a common technique for executing malicious code. The ML classifier strongly indicates maliciousness. The embedded JavaScript streams, particularly 'javascript_obj0005_000.js', likely contain obfuscated code intended to exploit a vulnerability or download a secondary payload. The specific exploit or payload mechanism is not fully discernible due to obfuscation, but the presence of eval() and ML flagging points to a high likelihood of exploit execution.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0005_000.js` `871184100e7083f17d46c1d1defc57cdf4a150f65cde1ddfa252570b5b238b1b`	pdf-javascript-stream	PDF /JS object 5 at offset 0x117	2304 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 7 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`javascript_obj0005_001.js` `4e3679ee7e51b9a1bec8cdc486d5b63bf55e0e31c910c831bf616e117d835101`	pdf-javascript-stream	PDF /JS object 5 at offset 0x117	247 bytes

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