MALICIOUS
148
Risk Score
Malware Insights
MITRE ATT&CK
T1204.002 Malicious File
T1566.002 Spearphishing Attachment
The PDF file utilizes XFA forms and contains an embedded script payload, as indicated by heuristic firings. ClamAV detections further confirm its malicious nature, identifying it as Pdf.Exploit.Dropped-78 and Pdf.Exploit.Agent-36809. The embedded script is likely responsible for downloading and executing a second-stage payload.
Heuristics 5
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ClamAV: Pdf.Exploit.Dropped-78 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Exploit.Dropped-78
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ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAVClamAV 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.
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Embedded script payload in PDF stream medium PDF_EMBEDDED_SCRIPT_PAYLOADPDF 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.
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XFA form low PDF_XFAPDF uses XML Forms Architecture — can contain script logic
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Embedded URL info EMBEDDED_URLOne 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.binfa285df93f88b25ee4656d9cf0c1e67a78e3737fbdf339fe2fb31b97f417556a |
pdf-embedded-script | PDF raw stream script payload at offset 0x329 | 14305 bytes |
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Detection
ClamAV:
Pdf.Exploit.Agent-36809
Obfuscation or payload:
unlikely
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