Based on the information provided, this document has characteristics of an agreement/contract, as it contains an introductory clause (recitals) beginning with "Whereas...", which is typical for contracts. Therefore I would translate this document into Russian as "договор", despite the fact that there is no such word in the English text. It would reflect the nature of the document correctly.

Given the recitals, one may assume that this agreement is most likely based on English law (however, it could be US law too). Therefore it is important to translate it word-for-word (this applies to the whole agreement) to preserve the accuracy of the original text: Договор о подтверждении, обязательствах и гарантии.

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Note added at 58 mins (2022-12-01 12:06:22 GMT)
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THIS ACKNOWLEDGEMENT, OBLIGATIONS AND GUARANTEE, dated as of... (hereinafter referred to as the “Signing Date”), is hereby made by and between...in favor of...

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Note added at 2 hrs (2022-12-01 13:48:55 GMT)
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To be 100% sure, the following questions need to be answered:
1. Can you find anywhere further in the text references to "this agreement", "this contract"?
2. Does it look like a standard contract with standard clauses pertaining to contracts (identification of the parties, duration of contract, governing law, representations and warranties, etc)? Is there intent to create legal relations?