PDF malware analysis — malicious · f6bbc4d9d7d1fa2b

MALICIOUS

PDF

94.1 KB

MD5: 04e88ac0366b9829972e428e738bb399 SHA-1: a6f816d7de4b10cdc807b61c4c06613f82c9ecdf SHA-256: f6bbc4d9d7d1fa2b276569b932cea89ce2f83488f77ef1c0022d7feecb756c78

178 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file utilizes XFA forms and contains an embedded script payload, as indicated by multiple heuristic firings including critical ClamAV detections. The ML classifier also strongly flagged this PDF as malicious. The embedded script is likely responsible for delivering the exploit, although its specific actions are not detailed in the provided evidence. The presence of XFA suggests a potential exploit targeting Adobe Reader or similar software.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

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

ClamAV detected this file as malware: Pdf.Exploit.Agent-6136306-0
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.
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
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_00000246.bin` `7fd5812fc150b66018257cb2d845838453cd2be28a608fa456e0cf1ebcad565a`	pdf-embedded-script	PDF raw stream script payload at offset 0x246	95636 bytes
Detection ClamAV: Pdf.Exploit.Agent-36769 Obfuscation or payload: unlikely

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