$file = "path\to\your\file.pdf"
$content = [System.IO.File]::ReadAllBytes($file)

# Convert EOF marker and file content to strings for index search
$eofMarker = [System.Text.Encoding]::ASCII.GetBytes("%%EOF")
$eofString = [System.Text.Encoding]::ASCII.GetString($eofMarker)
$fileContent = [System.Text.Encoding]::ASCII.GetString($content)

# Find last occurrence of %%EOF
$lastIndex = $fileContent.LastIndexOf($eofString)

if ($lastIndex -ge 0) {
    $newContent = $fileContent.Substring(0, $lastIndex + $eofString.Length)
    [System.IO.File]::WriteAllText($file + ".repaired.pdf", $newContent)
    Write-Output "File repaired and saved as $($file).repaired.pdf"
} else {
    Write-Output "%%EOF not found. File might not need repair."
}