PDF malware analysis — malicious · bd9aeb810b92b84c

MALICIOUS

PDF

26.6 KB Created: 'N9|M/Tëhïà÷ Ê8ß\Ù± Authoring application: |md¹Z¶Ò³¢zù| (via |md³Z³Ò²¢vùkô)

MD5: bb59aba6bbb262e29515781c33be2569 SHA-1: 3bda943447e22605460072eedeb93ae265644c18 SHA-256: bd9aeb810b92b84cfd951b1329de2f9b009e9e87d959f90d91daff7893d5ca53

64 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, which is used to obscure the actual malicious content. The PDF is encrypted and references JavaScript, indicating a technique to bypass static analysis. The presence of JavaScript actions and streams strongly suggests that the script is responsible for executing the malicious payload, likely involving obfuscation and further stages of execution.

Heuristics 4

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.
Optional Content Group with action trigger low PDF_OPTIONAL_CONTENT

Optional Content Group (layer) co-occurs with an action trigger — content can be selectively hidden from viewers or scanners while the action still fires on open

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0009_000.js` `19ef402eb262b6e0504b3d15ea9a54d3d86fa8fc563f4f6f402330655bc08baa`	pdf-javascript-stream	PDF /JS object 9 at offset 0x3C3	24718 bytes

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