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パスワード付きPDFのパスワードがわからなくなった?pdfcrackならなんとかしてくれるかも

Last updated at Posted at 2020-07-26

Note: 悪用は禁物なコマンドです。

以前頂いたPDFがパスワード付きになっていたが、パスワードがどうしても思い出せない。多分、数字4桁だったのだが…という機会があり、pdfcrackを使ったら瞬殺でパスワードを見つけてくれました。

pdfcrack -f hoge.pdf -n 4 -m 4 -c0123456789

-n: minimum password length
-m: maximum password length
-c: char set

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