Subject: Extraction Pdf 
I want to rename pdf files on the following principle: 
-- Old name: axxxx.pdf 
-- New name: expressionA_expressionB_expressionC.pdf 
But expressionA, expressionB, expressionC are extraction pdf file. 
example: text PDF 
"... 
.... blabla_black ..... blaba1yellow .... Red blaba2 
.. " 
I'm looking for the expression after blabla after blabla1 after blaba2. 
All words blabla, blabla1, blabla2 are all in PDF files 
The name of the PDF document is "black_yellow_red.pdf." 
black_yellow_red is a unique expression. 
Is this possible with Bulk Rename Utility? 
Excuse me my problem is not easy to explain. 
Thank you for your help