javascript obfuscator

Not necessarily; SWF content is permitted by Adobe's extension clauses, and the Flash Player source code isn't published. It is theoretically possible to include a definition that permits JSXBIN but only defines the concept of requiring 'a compatible interpreter' to run it. Not going to happen of course, Adobe has stopped tweaking the standards and a document that needs a proprietary handler will break the (now dominant) third party PDF engines in Web browsers etc.

If a PDF file's scripting is so valuable that you cannot possibly allow anyone to inspect the source code, then the only option is DRM (using Adobe's LiveCycle suite). Massively expensive to deploy, but as yet unbroken. Gov/Mil customers trust it.

Obfuscation was used for years by Adobe themselves, back when they sold Acrobat 3D - the injected code to manipulate and animate the 3D scene was obfuscated by a routine that Right Hemisphere supplied.

However, it's important to remember that JavaScript is an interpreted language; most obfuscators work by creating a wrapper function which reads a section of encrypted text, converts it back into 'real' code, then executes it with the eval() function. That is why antivirus software hates it, but it's relatively simple to copy the script and run it in an external compiler to capture the de-obfuscated version. You won't get all your variable names and line breaks back, but it'll be understandable to a JS programmer. It also doesn't necessarily need to be decrypted; if someone simply wants to take your script and use it in another document as-is, they can copy the obfuscated version. Everything in the structure of a PDF file is accessible to the recipients of a document unless you use rights management protection. Most third-party PDF software ignores the password/certificate 'restrictions' applied in Acrobat, which is why you get the big warning message the first time you try to apply it.

Other Adobe products support 'Binary JavaScript' (JSXBIN) which is a lot harder to turn back into human-readable text, however the PDF ISO standard does not allow that type of code.

what about this website ? does it compatible with acrobat ?

http://www.javascriptobfuscator.com/?jsov=2.34

i tried something by accident and that was for distribution that add kind of heavy protection without password, even i test the protection that prevent me to change my document or even access my code and i failed also i tried to crack the password that is not even exist and the document property tells me its not allowed to change the document or Document assemble, in first time in using acrobat i feel it really secured.