MALICIOUS
152
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The PDF file was identified as malicious by multiple heuristics, including a critical finding of a VBScript-style decimal byte array that decodes to a PE payload. This indicates the PDF acts as a dropper, designed to deliver and execute a secondary malicious executable. The embedded PE artifact and the ClamAV detection name further support this dropper functionality.
Machine Learning
- Nyx PDF Classifier malicious score 0.9956
Heuristics 3
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VBScript-style decimal byte array decodes to a PE payload critical PDF_VBS_DECIMAL_ARRAY_PE_PAYLOADPDF comment text contains a VB/VBScript-style decimal byte array, such as c(077),c(090), that decodes to a verified Windows PE executable. The rule is gated on a comment-line Array(c(...)) assignment and a valid MZ/PE header to keep false positives low.
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ClamAV: Pdf.Dropper.Agent-7276541-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Dropper.Agent-7276541-0
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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 |
|---|---|---|---|
decimal_array_pdf_pe_00000229.exe4543cf43ef87ccf7545ec9f711ae924a6a5a6b1020ed81ad1c551ae857c1370e |
embedded-pe | PDF raw comment decimal-array PE payload at offset 0x229 | 32942 bytes |
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Detection
ClamAV:
No threats found
Obfuscation or payload:
likely
Carved artifact entropy is 7.90, consistent with packed or encrypted content.
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