PDF malware analysis — malicious · d7d15408712f0694

MALICIOUS

PDF

150.0 KB

MD5: 1a3172803a1cd66ca6e3f982211fa517 SHA-1: 5bd7ba4dd00f92f634ec848e9b47b6c2f729c92d SHA-256: d7d15408712f0694e61f79d1f479f385139fca7d2dfecd7d512cc2d9d4be87be

268 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File Execution: User Execution: Malicious File

The PDF document contains XFA (XML Forms Architecture) which is known to be a vector for exploits. Critical heuristics indicate a heap spray exploit (`PDF_XFA_HEAP_SPRAY`) and embedded script payloads (`PDF_EMBEDDED_SCRIPT_PAYLOAD`, `PDF_XFA_SCRIPT`). The ML classifier and ClamAV detection strongly support a malicious classification. The embedded script is likely responsible for executing the exploit, potentially downloading a second-stage payload, though its exact function is obscured by obfuscation.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

Heuristics 9

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.
ClamAV: Pdf.Exploit.Agent-6136306-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-6136306-0
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
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
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules.
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.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL http://ns.adobe.com/xdp/
- http://www.xfa.org/schema/xfa-template/2.5/
- http://www.xfa.org/schema/xfa-data/1.0/

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_pdf_script_00000291.bin` `e53eaa44c79a568b406a15a279ff95275e17836347a4dd27dfdfe4da97287807`	pdf-embedded-script	PDF raw stream script payload at offset 0x291	152879 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

Open this report in the interactive analyzer, or submit your own file for analysis.