please check following link for Pakistani Nationals...
http://www.cic.gc.ca/english/pdf/kits/guides/3907e.pdf
Nationals of Pakistan:
The following documents are required for you, the principle applicant, and for each of your dependent family members, if applicable to your situation:
•Original birth certificates for yourself and your family members including your spouse or common-law partner. A birth certificate is acceptable if the registration of the birth was made shortly after the birth.
•Certified copies of your national identity card (CNIC).
•Original marriage certificate for you and your spouse (Nikkah Nama).
•Original death certificate(s) if your sponsor's or your former spouse(s), common-law or conjugal partner(s) is/are deceased.
•Original divorce certificate for you or your spouse's previous marriages. If a divorce has been obtained in Pakistan by a sponsor residing in Canada, you must submit evidence that either party of the divorce resided in Pakistan for at least one year prior to the divorce. Alternatively, you may submit evidence that either party to the divorce had a substantial connection to Pakistan such as frequent visits, property ownership, and/or active businesses in Pakistan.
•Official documentation confirming your relationship to your sponsor and both of your rela-tionships to the other family members on your application. This may include family lists and household registries.
•Original educational documents for you and your family members such as transcripts indicating a list of courses taken, scores achieved as well as certificates obtained.