MALICIOUS
128
Risk Score
Malware Insights
MITRE ATT&CK
T1204.002 Malicious File
T1566.002 Spearphishing Attachment
The PDF was flagged as malicious by a ML classifier with a score of 0.999985 and also detected by ClamAV as Pdf.Exploit.Dropped-90. The presence of the ASCIIHexDecode filter with exploit indicators and an embedded file further supports its malicious nature. The exact attack vector is unclear due to the lack of document body text or script content, but it is highly likely to be a delivery mechanism for further malicious activity.
Machine Learning
- Nyx PDF Classifier malicious score 1.0000
Heuristics 5
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ClamAV: Pdf.Exploit.Dropped-90 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Exploit.Dropped-90
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ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEXHex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
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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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PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILEDThe cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PSSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
Extracted artifacts 1
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
embedded_file_obj0001.bin5ceded2caf4c535139db583ce55de316e20839e27aa5cd6afced4a841ee5d18e |
pdf-embedded-file | PDF EmbeddedFile object 1 at offset 0x5A | 1874 bytes |
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