Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8ab49d8d37979ae…

MALICIOUS

PDF

12.0 KB
MD5: 7e201de7b1ad8d7f80151302855563d6 SHA-1: 202cfd3530e96e3b1612d72f02a38be29d84a311 SHA-256: f8ab49d8d37979aea25a40b0b3279fb1680f6393f64b35a1b49366d422c9e644
98 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.002 Spearphishing Attachment

The PDF file was detected by ClamAV as Pdf.Exploit.Dropped-90, indicating it is a known malicious exploit. The presence of ASCIIHexDecode filters with exploit indicators further supports this. The embedded file suggests a payload delivery mechanism. The lack of readable document body text prevents a more specific attack pattern description.

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
2a1239c35be16f5db4a59489ae10c58d4bde0cde5f13372e3d159ab2e4659f4b
pdf-embedded-file PDF EmbeddedFile object 1 at offset 0x5A 1875 bytes