Applescript: Extract data from pdf

Question

I am trying to extract a string from a pdf, and then rename the pdf with that string. The string varies in length, but always comes between "Name:" and "ID:"
Ideally I could drop a pdf with multiple pages, and it would extract the individual sheets and rename as new documents with this string.
From another thread, I've tried using this shell script (the Citing Patent and Classifications were the delimiters):
for f in "$@" 
do 
     echo "$f" >> ~/Desktop/Patent01.txt 
     cat "$f" | sed -n '/Citing Patent/,/CLASSIFICATIONS/p' | sed  's/CLASSIFICATIONS//p' >> ~/Desktop/Patent01.txt 
done
Thanks!

Answer 1

Replying to self with progress, and maybe someone can help.
Drop the single page pdf onto the script; it calls an automator which converts the pdf to plaintext; applescript then reads the txt file for the data I want; last step is to rename the original file with the string that I want (a name).
I'm getting error -10006, can't rename. Below is the script and a screenshot of the automator.
on open fileList
  tell application "Finder"
  --set thePDFfile to (choose file)
  repeat with thePDFfile in fileList
  set theInfo to info for thePDFfile
  set theFile to name of theInfo
  set qtdstartpath to quoted form of (POSIX path of thePDFfile)
  set workflowpath to "/Users/Galen/PDFextract/NoInput.workflow"
  set qtdworkflowpath to quoted form of (POSIX path of workflowpath)
  set command to "/usr/bin/automator -i " & qtdstartpath & " " & qtdworkflowpath
  set output to do shell script command
  --do shell script "automator /Users/Galen/PDFextract/NoInput.workflow"
  set AppleScript's text item delimiters to "
  set thetext to text items of (read "/Users/Galen/Desktop/ExtractOutput.txt")
  set studentName to item 2 of thetext
  set AppleScript's text item delimiters to " "
  set thetext to text items of studentName
  set lastName to item 2 of thetext
  set firstName to item 3 of thetext
  set lastFirst to (lastName & " " & firstName)
  --return lastFirst
  set AppleScript's text item delimiters to ""
  set the name of theFile to ((lastFirst as text) & ".pdf")
  end repeat
  end tell
end open