PDF document modified remotely after being sent to me?

[Honor1587]

Hi. I was wondering if it is possible for a sender of a PDF to modify/edit the PDF after sending it? As I received a PDF and now there has been information changed in it and I am trying to figure out how it was done? I would appreciate any help anyone could give me, Thank you

[kglad]

in the future, to find the best place to post your message, use the list here, https://community.adobe.com/

p.s. i don't think the adobe website, and forums in particular, are easy to navigate, so don't spend a lot of time searching that forum list. do your best and we'll move the post (like this one has already been moved) if it helps you get responses.

<"moved from using the community">

[try67 · Accepted solution]

No, not remotely, but the file can contain code that will modify the way it looks. However, you will always be able to close the file without saving it, disable JavaScript in the application, and then go back to the original version (unless you installed a script file that will allow the code to save the modified file silently).

[try67]

NB. This is assuming the file is saved on your local machine. If you're viewing it on a remote server, or the cloud, then it's possible it was updated there, and then you opened the new version of it the second time you accessed it.

[Honor1587]

Hi, Thank you for your reply. The file is saved on my computer.

[try67]

Then the chances of it happening without you knowing about it are extremely small. What kind of changes do you think happened to it? And does it also happen if you open the original file with JS disabled?

[Honor1587]

Hi, it's changed now, nothing I can do about it. It's all so complicated! Thank you so much for your help I really appreciate it