Malicious PDF — malware analysis report

Static analysis result for SHA-256 220fb31d8fa23c02…

MALICIOUS

PDF

12.1 KB
MD5: 472aa4efa93d94206b6c4600560bfe25 SHA-1: 7b143bc4ab5c89b828aa70593e4c078d6f96f62a SHA-256: 220fb31d8fa23c02a31597fba040e1373d772e19c5b28117d4179607c07be244
98 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1027 Obfuscated Files or Information

The critical ClamAV detection of 'Pdf.Exploit.Dropped-90' strongly indicates malicious intent. The presence of PDF filters with exploit indicators and an embedded file further supports this. The file's purpose is likely to exploit a PDF vulnerability to download and execute a secondary payload, though no specific script was extracted to detail this further.

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
28b534a7a025dcf795a4a10a0237ca3f197bae9d5ef79d4257a0ea4a47279789
pdf-embedded-file PDF EmbeddedFile object 1 at offset 0x5A 1879 bytes