PDF malware analysis — malicious · bfd873d7c1bb4899

MALICIOUS

PDF

8.7 KB Created: ')ÂPcCê¿ }+[ Authoring application: 0ÚRp Zê¨ j)^& (via 0ÚRp ZÂ|dV] fÓ\íò~³UZ¶@Ï)

MD5: 36e9112a9f7a0be5936aaa22a59c18c0 SHA-1: 1da4f0c7ba760d367fda804fb64ed5c43f3db57d SHA-256: bfd873d7c1bb4899a546cf46c5444a5747c203797341b732c9778580893c246a

86 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1566.001 Spearphishing Attachment

The PDF file is flagged as malicious by an ML classifier and contains embedded JavaScript. The JavaScript is used to obfuscate and hide the PDF's content, indicated by the 'PDF_ENCRYPTED_WITH_JS' heuristic. This suggests the document is designed to bypass static analysis and deliver a malicious payload. No specific IOCs were extracted due to the obfuscation.

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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