PDF malware analysis — malicious · 08d72d437afc50d5

MALICIOUS

PDF

18.3 KB

MD5: b4e0919e141f3daaf774d8443ff2405a SHA-1: c218f7fa16d4ac08c7e02df021c1fd6a01bd35c9 SHA-256: 08d72d437afc50d533db0ee3f44d4553a256601856afa4655ec73e243fa8e2e4

168 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript, indicated by the 'PDF_EMBEDDED_SCRIPT_PAYLOAD' heuristic and the presence of script content. This script is likely responsible for executing a malicious payload, as confirmed by ClamAV detections ('Pdf.Exploit.Dropped-78' and 'Pdf.Exploit.Agent-36809'). The ML classifier also strongly flagged this PDF as malicious. The embedded script's complexity and truncated nature prevent a more detailed analysis of its specific actions, but its presence strongly suggests an exploit targeting the PDF reader to achieve code execution.

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` `d9bacfdc69a4c782c64b8285b413158c09c5c27fe61c4f4d9b9e1f514cf922f2`	pdf-embedded-script	PDF raw stream script payload at offset 0x329	18057 bytes
Detection ClamAV: Pdf.Exploit.Agent-36809 Obfuscation or payload: unlikely

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