PDF malware analysis — malicious · 8debdb59f1f88777

MALICIOUS

PDF

12.1 KB

MD5: 249eff4946a5a968b8725947c1662277 SHA-1: dff4e77672271f0f0d40148f8510bb33b40b26ab SHA-256: 8debdb59f1f88777924b7a6e48f70cfab30b824cd956e4e0711216d9a73ea178

130 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1566.002 Spearphishing Attachment

The file is identified as a malicious PDF by multiple detection engines, including ClamAV and an ML classifier. The presence of PDF_FILTER_HEX with exploit indicators suggests an attempt to obfuscate malicious content, likely to exploit a PDF vulnerability. An embedded file was also detected, indicating a dropper or downloader functionality.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

ClamAV: Pdf.Exploit.Dropped-90 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Dropped-90
ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX

Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
Embedded file low PDF_EMBEDDED

PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
XFA form low PDF_XFA

PDF uses XML Forms Architecture — can contain script logic
PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED

The 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.bin` `4cd28385fdea25b1ebf5b0b0b9615c8e88b39389f4f3ac2ab7589f8fb5818d74`	pdf-embedded-file	PDF EmbeddedFile object 1 at offset 0x5A	1879 bytes

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