If it is necessary to extract text from a specific location on a page in order to use it in the output file name, then the algorithm is as follows:

1. First, use a ruler/grid tool (Use Ctrl+U and Ctrl+R keyboard shortcuts to toggle the tools on/off) to determine the coordinates on the page where the "text of interest" is located. If there are multiple areas, measure each one and record the coordinates.

2. In JavaScript code, enumerate all words on the page using this.getPageNthWordQuads() method that returns coordinates for each word as an array of coordinates.

3. Check each "quad" returned by the function against the area(s) of interest (determined manually in step 1). Complication: it is necessary to take page rotation and difference in coordinate systems into account when checking each quad. Quads are returned in the page coordinate system (user space, origin is in bottom-left corner), while coordinates on screen are measured in screen coordinate system (device space, origin is in upper-left corner, y-axis is pointing down).

4. If the word lies inside an "area of interest", add it to the output text string.

5. Once done enumerating the words, save the file using this.SaveAs() method while combining a predefined output path with the extracted text.

Drawbacks:

1. Coordinates for the text needs to be measured manually.

2. If new documents with a different layout are used, then the script needs to be edited with new coordinates.

3. Can be a very slow process if there is a lot of text and a lot of files involved.

The similar script can be used if the text of interest conforms to a well-defined text pattern (such as SSN, account number, client ID, email and etc.). Then there is no need to measure text coordinates and text can be extracted by performing a text search. In this case, all words need to be enumerated using this.getPageNthWord() method and the resulting text string can be searched using a regular expression.

Here is a link to a script that shows how to extracts SSNs from a page text: Acrobat Javascript Samples Scripts. Similar approach can be used to extract text and then use it to save a file with a custom file name. The advantage of this method is its flexibility, since it does not rely on a fixed text location(s) that can be easily changed. This method will be slower than a first one, since all page text needs to be extracted before it can be searched.

We are here to help you with script problems not write the entire script for you.

https://acrobatusers.com/tutorials/how-save-pdf-acrobat-javascript

How to Save a PDF with Acrobat JavaScript

by Thom Parker will get you started with the folder level script for saving using JavaScript. You can use the document object's info.Keywords method to get