PDF malware analysis — malicious · d40eb093ef304d9e

MALICIOUS

PDF

12.1 KB

MD5: 8ee879cf8add12e502f4982a673f22d9 SHA-1: 101f1c282221a297951c3536ec0fe1cb8de3cafe SHA-256: d40eb093ef304d9ea5c99f2c619036d62aed2a059fd97809c9b7a907e4970508

98 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: User Execution T1566.002 Phishing: Spearphishing Attachment

The PDF file was flagged as malicious by ClamAV with the signature Pdf.Exploit.Dropped-90, indicating it contains an exploit. The presence of ASCIIHexDecode filters with exploit indicators further supports this. The embedded file suggests a dropper mechanism, likely intended to download and execute a second-stage payload.

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` `fd9c5da6f6adc82f505325a53241a8c1d674103c145bd5644f844dbabb2c54b5`	pdf-embedded-file	PDF EmbeddedFile object 1 at offset 0x5A	1880 bytes

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