Thanks for the reply.
I have tried the link
http://www.zamzar.com/ and found only the garbled text (Refer below)
Example text:
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; È ›ÙÚÛ=ÜÖ × Ý
É ¦3§¡Ñ¨T Þ^—%ø š-…ó‰ßº1¦3§àEÏ;
ñ16S¶·N¾É¿3áâ ¦3§ãH—±Ð×°±›ä1+ v å0 æçÜ „ó©ªdPèóé'/ê kcëÖäÏ¿œìí§ (
!"#$%&'( )*+,
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And moreover, I am not interesting in OCR as the source is text PDF and OCR requires manual proofing & correction but which is not a easy job because of Chinese language.