PDF malware analysis — malicious · c53cec2111837cf3

MALICIOUS

PDF

14.9 KB

MD5: 51e55ed6c6835c182a072ecf9ce6342a SHA-1: 6bbecc637f34c1885d8b07d82d439179f04000a3 SHA-256: c53cec2111837cf3dbb6efac09a001e132a95bc4c21ad8b23b73b985d3e66bc5

130 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains XFA form elements with embedded JavaScript that triggers a heap spray exploit. This script is designed to download and execute a second-stage payload from the reconstructed URL 'http://kikillusfbgwrevgtynd-remotet.dyndns-remote.com:80/subs.php?spamnva=4&django=151&back=152'. The presence of XFA heap spray and embedded script strongly indicates a malicious intent to compromise the user's system.

Heuristics 5

XFA form contains risky executable script high CVE related PDF_XFA_SCRIPT

PDF embeds an XFA form whose script block contains exploit, submission/launch, or shell-execution primitives. Ordinary LiveCycle print/update scripts are left as generic XFA/JS signals unless stronger behavior is present.
XFA JavaScript heap-spray exploit code critical PDF_XFA_HEAP_SPRAY

PDF contains XFA script content with heap-spray or shellcode-like JavaScript markers such as large encoded word sequences, util.pack, large arrays, or spray variable names. This is a weaponised Adobe Reader exploit pattern, not a normal interactive form.
Embedded script payload in PDF stream medium PDF_EMBEDDED_SCRIPT_PAYLOAD

PDF stream bytes contain an HTML/XFA <script> tag without accompanying Windows shell-execution primitives — common in accessible XFA forms but worth surfacing for analyst review.
XFA form low PDF_XFA

PDF uses XML Forms Architecture — can contain script logic
Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_000_off00002585.js` `a00dac1d4d348c247a8fa2034a9ecc53242cb7001e8cb18e906308c5652200f2`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x2585	23696 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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