Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfebb3129e90bc96…

MALICIOUS

PDF

12.1 KB
MD5: 455ea1090b1f27eac86a331af1d281c7 SHA-1: 7205f9a378622c55022d389ec886587ece23290e SHA-256: bfebb3129e90bc96c74517d2fb1426cc5e8479b16e4e4560cd9d26c5dac14429
98 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File

The PDF file was detected by ClamAV as Pdf.Exploit.Dropped-90, indicating it contains an exploit. The presence of ASCIIHexDecode filters with exploit indicators further supports this. An embedded file was also found, suggesting the PDF is used to deliver a secondary 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.

FilenameKindSourceSize
embedded_file_obj0001.bin
f4b5da7fd6b032b48f8b7a2cf96bf0e360654685ee19c445a5d2a4e728b2cc66
pdf-embedded-file PDF EmbeddedFile object 1 at offset 0x5A 1879 bytes