PDF malware analysis — malicious · 2252c580ff2e6182

MALICIOUS

PDF

11.1 KB

MD5: 33f486e88bda84c5df7d5cc3fe90b762 SHA-1: f9ad971cd11329d016da099fbac30c4fb80dbd8f SHA-256: 2252c580ff2e6182104223789b3123e96511ad2fbb7ee81b683d13a5c1a57045

180 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains XFA (XML Forms Architecture) which is known to be vulnerable to heap spray attacks. The embedded JavaScript, identified as a heap-spray exploit, is highly suspicious and likely responsible for downloading and executing a secondary payload. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a dropper.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

Heuristics 5

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.
ClamAV: Pdf.Dropper.Agent-6293269-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-6293269-0
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_off00000043.js` `4b5a4f0242df37a5bdfd836dcf0cd6397c26857af5057a76df9f3d3f4606cf5f`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x43	4194304 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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