Malicious PDF — malware analysis report

Static analysis result for SHA-256 fba808c575ce3cf1…

MALICIOUS

PDF

33.6 KB
MD5: b32c188f15dbb811a681852b3b761f09 SHA-1: 53f3ecb0a19420c64ec0de0897955e6b483be90d SHA-256: fba808c575ce3cf1423f4fd4f6d7d4cbab4edfe9e009b9a0a86899a0f1e206ae
90 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains an embedded JavaScript payload, indicated by the 'PDF_EMBEDDED_SCRIPT_PAYLOAD' heuristic. ClamAV also flagged it as 'Heuristics.PDF.ObfuscatedNameObject', suggesting malicious intent. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload, which is a common attack vector for malicious PDFs. The XFA form heuristic further supports the presence of complex, potentially malicious, form elements.

Heuristics 4

  • ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
  • Embedded script payload in PDF stream medium PDF_EMBEDDED_SCRIPT_PAYLOAD
    PDF stream bytes contain an HTML/XFA <script> tag without accompanying Windows shell-execution primitives — common in accessible XFA forms but worth surfacing for analyst review.
  • 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
stream_000_off0000005f.js
4d5ab131b5248a1d2f999fd3cf5983e83c8fb749eac556dc5fabc784631eff0f		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5F 8324 bytes

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