PDF malware analysis — malicious · 799752998e99ed2b

MALICIOUS

PDF

6.3 KB Created: [ÔÂûþWoÅg *| Authoring application: L¢¬,Óg 6} (via L¢¬,Óq|8XÊÆÖkSiô¡e)dËO)

MD5: 04425ac734cb3498d4548f357611927e SHA-1: 1fb447b0d3c4204a2399150afaee576ab4f21da9 SHA-256: 799752998e99ed2bb1e271e2e1dbe8b67c15ef5ddb10d27f8a9dc205477aa271

86 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1553.004 Subversion: Mark-of-the-Web Bypass

This PDF sample was flagged as malicious by a machine learning classifier with high confidence. It contains embedded JavaScript and is encrypted, with the JavaScript action likely used to decrypt and execute the payload, thus hiding it from static analysis. The presence of JavaScript and encryption points towards an attempt to deliver a secondary malicious payload.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 3

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

PDF declares /Encrypt and also references an executable trigger (/OpenAction). 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.

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