PDF malware analysis — malicious · 25830eecbe144320

MALICIOUS

PDF

14.6 KB Created: N]]7ëÎ¬c×OFã][(

MD5: 977c984367355f590a8bb159f76d94d9 SHA-1: 1a1a1c77da9a62caae618745be5e2dac76afe56f SHA-256: 25830eecbe144320cf5e74614e967b0f272a4362a801665258ad67c1255bb7d2

86 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

This PDF was flagged as malicious by an ML classifier and contains embedded JavaScript. The PDF is also encrypted, with the encryption itself being controlled by JavaScript, indicating an attempt to obscure malicious content. The JavaScript stream is likely responsible for downloading and executing a second-stage payload, though its exact functionality is obscured by the encryption and obfuscation.

Machine Learning

Nyx PDF Classifier malicious score 0.9984

Heuristics 3

Encrypted PDF carries /JavaScript — payload hidden from static analysis high PDF_ENCRYPTED_WITH_JS

PDF declares /Encrypt and also references an executable trigger (/JavaScript). Document encryption hides the JavaScript body and stream contents from static scanners — combined with auto-execution indicators this is a known evasion pattern used to deliver weaponised JavaScript that the analyst cannot inspect without the decryption key.
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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0260_000.js` `bf745a34dda2c28199ee4c3e833f67d0d2c9ec2a2f9fcb44ab42a1e767acd0dd`	pdf-javascript-stream	PDF /JS object 260 at offset 0x2326	872 bytes

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