PDF in AIR - read PDF scroll position? No events.

I'd like to capture scroll events when viewing a PDF file, and I can't figure out how to do it (or if it can be done).
I have a pretty simple AIR application, where I'm trying to render PDF content in AIR. This includes:
<mx:HTML id="myHTML" height="600" width="{this.width-40}" location="http://www.google.com" />
    myHTML.addEventListener(Event.SCROLL, imageScrolled);
    myHTML.addEventListener(Event.COMPLETE, complete);
    myHTML.addEventListener(Event.HTML_RENDER, htmlRender);
    myHTML.addEventListener(Event.LOCATION_CHANGE, locationChange);
These events all trigger just fine when normal web pages are loaded. As soon as a PDF URL is displayed, there are no events, when scrolling the PDF.
Has anyone found a workaround for receiving these events? I suppose I could look into scripting within the PDF file (would this work?), but I was trying to handle generic PDF files.

But if you want to interact and control a PDF from AIR you can make it using JS.
http://www.adobe.com/devnet/acrobat/javascript.html

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Back up all data before making any changes. Please take each of the following steps until the problem is resolved.
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If Adobe Reader or Acrobat is installed, and the problem is just that you can't print PDF's displayed in Safari, you may be able to print by moving the cursor to the the bottom edge of the page, somewhere near the middle. A black toolbar may appear under the cursor. Click the printer icon.
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If you get a message such as ""Adobe Reader blocked for this website," then from the Safari menu bar, select
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PDF in AIR - read PDF scroll position? No events.

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