MALICIOUS
108
Risk Score
Malware Insights
MITRE ATT&CK
T1204.002 Malicious File
T1566.002 Spearphishing Attachment
The PDF was flagged by a machine learning classifier with high confidence and also detected by ClamAV as Pdf.Exploit.Agent-36874. The presence of XFA forms and AcroForm buttons with action triggers suggests an attempt to exploit PDF reader vulnerabilities. The ML classifier's high output score and the ClamAV detection strongly indicate a malicious exploit embedded within the PDF, likely designed to download and execute a secondary payload.
Machine Learning
- Nyx PDF Classifier malicious score 0.9993
Heuristics 4
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ClamAV: Pdf.Exploit.Agent-36874 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Exploit.Agent-36874
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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.
Extracted artifacts 1
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
stream_001_off000008ed.binfcf1cba49be036239bc9331217e0265d5444cb428cde4aa16e17fe2930543689 |
decompressed-pdf-stream | PDF FlateDecoded stream at offset 0x8ED | 1424 bytes |
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Detection
ClamAV:
No threats found
Obfuscation or payload:
likely
Carved artifact contains 1 long base64-like blob(s).
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