Malicious PDF — malware analysis report

Static analysis result for SHA-256 df821a4966c4ed24…

MALICIOUS

PDF

42.4 KB
MD5: 821f9ea3100cd98b7daad56359ed66bd SHA-1: 5354d9393735aa8751b1629663d5f6ea60bf9c8b SHA-256: df821a4966c4ed248d0ceebb6f3c16f3afdc54625da6ba3e78085056c414f980
156 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.001 Spearphishing Attachment T1059.001 PowerShell

The critical ClamAV detection 'Pdf.Exploit.Agent-36830' strongly indicates a known PDF exploit. The presence of embedded files and scripts, along with the PDF_EMBEDDED_SCRIPT_PAYLOAD heuristic, confirms that this PDF is designed to execute malicious code. The embedded artifact is likely the second-stage payload. The document body content is not human-readable and appears to be obfuscated or malformed data.

Heuristics 6

  • ClamAV: Pdf.Exploit.Agent-36830 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36830
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • 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.
  • 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
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://ns.adobe.com/xdp/
    • http://www.xfa.org/schema/xci/1.0/
    • http://www.xfa.org/schema/xfa-template/2.5/
    • http://www.xfa.org/schema/xfa-data/1.0/

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0008.bin
0a2224c4023b216235b61c3fc4dd17bbfac1ab23a545687f51b97604cf654712		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xD7 46 bytes
embedded_file_obj0009.bin
b944085dca90e1bfb7db4b4f8c38810dcb1dee7031ed76dc96139f870c4280df		 pdf-embedded-file PDF EmbeddedFile object 9 at offset 0x14D 687 bytes
embedded_file_obj0010.bin
0fe7596619d7974f48bb0928a6efec8cf5bea691a6bfb71cb5fbc41c3ca73638		 pdf-embedded-file PDF EmbeddedFile object 10 at offset 0x447 168 bytes
embedded_file_obj0011.bin
7f72fbee06947d3619ed3a009fcd363416da8be497f3fd6410f6a555499196cc		 pdf-embedded-file PDF EmbeddedFile object 11 at offset 0x53A 435 bytes
embedded_file_obj0012.bin
d2f06f3fc6900856fe613a64a561919c8454dcbe0fdf238fb8b43e07016955ea		 pdf-embedded-file PDF EmbeddedFile object 12 at offset 0x738 190 bytes
embedded_file_obj0014.bin
a9ad7bd0138b57b266df3ba250a5ed586927015871a6ab1188cf5c478878a249		 pdf-embedded-file PDF EmbeddedFile object 14 at offset 0x843 40621 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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