This is possible with regular expressions..
Check Section "Replacement regular expressions" in this link
https://www.ibm.com/support/knowledgecenter/en/SSAE9L_4.0.0/com.ibm.content.collector.doc/expression_editor/r_afu_regular_expression_samples.htm
For your case it would be like this
Regex: (\w*)\^(\w*)\^(\w*)\^(\w*)(.pdf)
Sample filename: Grey^House^47^IBMDrive.pdf
Replacement String:
$1 => Grey
$2 => House
$3 => 47
$4 => IBMDrive
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DHANANJAYA MADIRAJU
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