MALICIOUS
74
Risk Score
Malware Insights
MITRE ATT&CK
T1059.001 PowerShell
T1566.002 Spearphishing Attachment
T1140 Deobfuscate/Decode Files or Information
The PDF document exhibits multiple indicators of malicious intent, including the use of ASCII85Decode filters and an embedded file, as flagged by heuristics. The ML classifier strongly indicates maliciousness. While no specific script was extracted, the presence of an embedded file suggests the PDF is designed to act as a dropper or initial access vector, likely leading to the execution of further malicious code.
Machine Learning
- Nyx PDF Classifier malicious score 1.0000
Heuristics 4
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Suspicious extracted artifact medium 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 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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ASCII85Decode filter (with exploit indicators) low PDF_FILTER_85ASCII85 encoding filter present alongside exploit delivery indicators — uncommon outside of obfuscation
Extracted artifacts 1
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
embedded_file_obj0001.bin |
pdf-embedded-file | PDF EmbeddedFile object 1 at offset 0x62 | 1508 bytes |
SHA-256: fc2d3da8bd715abea5721c1bb94616400e7933b11ded0b20741fb3e86227f12d |
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Detection
ClamAV:
No threats found
Obfuscation or payload:
likely
Static shellcode analysis found candidate code region(s). Indicators: NOP sled
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