MALICIOUS
216
Risk Score
Malware Insights
MITRE ATT&CK
T1204.002 Malicious File
T1059.007 JavaScript
T1566.001 Spearphishing Attachment
The PDF sample was flagged as malicious by ML classifiers and ClamAV with the signature Pdf.Exploit.Agent-36962. High severity heuristics indicate the presence of XFA forms containing risky executable scripts and an eval() call, suggesting it's designed to execute embedded code. The embedded file artifact further supports the payload delivery mechanism.
Machine Learning
- Nyx PDF Classifier malicious score 0.9994
Heuristics 9
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XFA form contains risky executable script high PDF_XFA_SCRIPTPDF 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.
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ClamAV: Pdf.Exploit.Agent-36962 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Exploit.Agent-36962
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eval() call high PDF_EVALeval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
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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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Embedded file low PDF_EMBEDDEDPDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
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XFA form low PDF_XFAPDF uses XML Forms Architecture — can contain script logic
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AcroForm button with action trigger low PDF_ACROFORM_BUTTONPDF contains a /Btn form field together with a SubmitForm/URI/Launch/JS trigger — this is the building block of fake 'Download' or 'Open' button overlays used in PDF phishing lures
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Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGEOne 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.
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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.w3.org/1999/02/22-rdf-syntax-ns#
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
Extracted artifacts 6
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
embedded_file_obj0041.binc06dcd026a7ea0536b63e07ce688691b585339a3ab7ff59065e546b56308c7bb |
pdf-embedded-file | PDF EmbeddedFile object 41 at offset 0x38E5 | 85 bytes |
embedded_file_obj0042.binb40a217a8d9b8d3671cc3874c550d30941b93ca6dde99995d43921dede579865 |
pdf-embedded-file | PDF EmbeddedFile object 42 at offset 0x3997 | 1183 bytes |
embedded_file_obj0043.bin071dcacec007fe9d49047a4376936f5b9162cda913212488fa1bd649eeffc472 |
pdf-embedded-file | PDF EmbeddedFile object 43 at offset 0x3BE7 | 1714 bytes |
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Detection
ClamAV:
No threats found
Obfuscation or payload:
likely
Carved artifact contains 1 eval/decoder/string-building token(s).
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embedded_file_obj0044.bin3dd68f00f4fcb366a2a3a17c65cb2626eeddf5ea5713302d374310561d810169 |
pdf-embedded-file | PDF EmbeddedFile object 44 at offset 0x3F93 | 144 bytes |
embedded_file_obj0045.bince4a3f07835c725838e55947d6b1f21771e0ad8084ee86d0890ecc12bd5231fd |
pdf-embedded-file | PDF EmbeddedFile object 45 at offset 0x4055 | 2427 bytes |
font_00_cff_off00004425.bin062eede2d0cc5d3972869dc7e2f2f9f01d1d1b3756b715c8252f06948ce99ae2 |
pdf-font-stream | PDF embedded font (cff) at offset 0x4425 | 1192 bytes |
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