I got a virtual disk from a CyberSecurity vendor, I want to check the files on it.
When I set my virtual machine boot from this disk, it can normally boot.

I want to check the files on it, so I attach this disk to my Rocky linux VM.
But when I try to mount this disk, I got this:

[root@rocky ~]# mount /dev/sda1 /mnt/
mount: /mnt: wrong fs type, bad option, bad superblock on /dev/sda1, missing codepage or helper program, or other error.

And fdisk -lresult seems no partition is bootable, and could not show the file system type:

[root@rocky ~]# fdisk -l /dev/sda
Disk /dev/sda: 2 GiB, 2147483648 bytes, 4194304 sectors
Disk model: VMware Virtual S
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x00000000

Device     Boot   Start     End Sectors  Size Id Type
/dev/sda1          8192  270335  262144  128M 83 Linux
/dev/sda2        270336  794623  524288  256M 83 Linux
/dev/sda3        794624 1843199 1048576  512M 83 Linux
/dev/sda4       1843200 4194303 2351104  1.1G 83 Linux

Other commands like file -sL, lsblkalso cound not show the file system:

[root@rocky ~]# file -sL /dev/sda
/dev/sda: DOS/MBR boot sector

[root@rocky ~]# file -sL /dev/sda1
/dev/sda1: data

[root@rocky ~]# file -sL /dev/sda2
/dev/sda2: data
[root@rocky ~]# blkid /dev/sda1 

[root@rocky ~]# lsblk -f
NAME        FSTYPE      FSVER    LABEL UUID                                   FSAVAIL FSUSE% MOUNTPOINTS
sda                                                                                          
├─sda1                                                                                       
├─sda2                                                                                       
├─sda3                                                                                       
└─sda4                                                                                       
sdb                                                                                          
├─sdb1      crypto_LUKS 1              cd0f54e1-c215-4f6a-ab52-cf45dbd5fe96                  
├─sdb2      crypto_LUKS 1              35474f2f-1152-4c42-8c2c-0fd31b8efd93                  
├─sdb3      crypto_LUKS 1              3e03772c-43cf-4f95-9296-cf31257e9555                  
├─sdb4                                                                                       
├─sdb5      crypto_LUKS 1              b7284d45-1c55-4824-8f53-bb634850a0ca                  
├─sdb6      crypto_LUKS 1              60b950b0-681c-438e-840e-f324ba69c0eb                  
└─sdb7      swap        1              4af799e0-846f-4b44-9162-65864992b315                  
nvme0n1                                                                                      
├─nvme0n1p1 xfs                        e520efe8-6d78-4257-888f-29fa74a7ac05      826M    19% /boot
└─nvme0n1p2 LVM2_member LVM2 001       zND1Rf-olxV-jiuN-7ZHN-EuK4-IGr1-2H08Qv                
  └─rl-root xfs                        508099b5-3255-4e00-b28e-fb07efb80f2c     37.7G    23% /


[root@rocky ~]# lsblk -no FSTYPE /dev/sda





[root@rocky ~]# lsblk -no FSTYPE /dev/sda1

[root@rocky ~]# lsblk -no name,fstype
sda         
├─sda1      
├─sda2      
├─sda3      
└─sda4      
sdb         
├─sdb1      crypto_LUKS
├─sdb2      crypto_LUKS
├─sdb3      crypto_LUKS
├─sdb4      
├─sdb5      crypto_LUKS
├─sdb6      crypto_LUKS
└─sdb7      swap
nvme0n1     
├─nvme0n1p1 xfs
└─nvme0n1p2 LVM2_member
  └─rl-root xfs

The only command which can provide something is fsck, it shows this may be an ext2 format partition:

[root@rocky ~]# fsck -N /dev/sda
fsck from util-linux 2.37.4
[/usr/sbin/fsck.ext2 (1) -- /dev/sda] fsck.ext2 /dev/sda 
[root@rocky ~]# fsck -N /dev/sda1 
fsck from util-linux 2.37.4
[/usr/sbin/fsck.ext2 (1) -- /dev/sda1] fsck.ext2 /dev/sda1

But mount with -t ext2 still not work:

[root@rocky ~]# mount -t ext2 /dev/sda1 /mnt/
mount: /mnt: wrong fs type, bad option, bad superblock on /dev/sda1, missing codepage or helper program, or other error.
[root@rocky ~]#

I upload this vmdk to OneDrive: disk1.vmdk

Anybody have ideas, what can i do next?
Thanks a lot!

I want to know how to mount this virtual disk.