PDF malware analysis — malicious · 122ea007e89e0437

MALICIOUS

PDF

18.4 KB

MD5: b5cd6e2ebd6527a117baa157f9611002 SHA-1: 34a8744186b39794790c4f361ca93337e2b464f4 SHA-256: 122ea007e89e0437e1bfa5081b092e230934ba90eb656fb62387e834cd78a112

168 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF utilizes XFA forms and contains an embedded JavaScript payload, as indicated by multiple heuristics and ClamAV detections. The embedded script, though heavily obfuscated, is designed to execute and likely download a secondary malicious artifact. The ML classifier and ClamAV detections strongly suggest malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

ClamAV: Pdf.Exploit.Dropped-78 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Dropped-78
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
XFA form low PDF_XFA

PDF uses XML Forms Architecture — can contain script logic
Embedded script payload in PDF stream low 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.
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://www.xfa.org/schema/xfa-template/2.5/

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_pdf_script_00000329.bin` `784330f92e025133e7ed5537284c2e6e526ad992e70ba491a3e12882176d4a0b`	pdf-embedded-script	PDF raw stream script payload at offset 0x329	18157 bytes
Detection ClamAV: Pdf.Exploit.Agent-36809 Obfuscation or payload: unlikely

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