Malicious PDF — malware analysis report

Static analysis result for SHA-256 d33894b7ca461a93…

MALICIOUS

PDF

42.8 KB
MD5: ab58f19767c148fbace42ef06c5b7baf SHA-1: b3724d6f984cba73e0234392de90ba0da1f130db SHA-256: d33894b7ca461a932aedcf96f634ed443a4531cb29ba4114dfdc6a50faab1731
186 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious File T1204.002 Malicious File: Malicious PDF

The PDF was flagged by multiple heuristics, including ML classification and ClamAV detection, indicating it is a malicious exploit. The presence of embedded script payloads and embedded files strongly suggests it is designed to download and execute a second-stage payload. The ClamAV detection name 'Pdf.Exploit.Agent-36830' is included as a primary IOC.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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 0xC6 46 bytes
embedded_file_obj0009.bin
ea0c2c0beae80c893f1afe4f4951988f754130c2dd0dbead7a594b9b18b84d7f		 pdf-embedded-file PDF EmbeddedFile object 9 at offset 0x13C 685 bytes
embedded_file_obj0010.bin
8259db878f85521b2ee9c7ec108d34b19d3b6c900af7d501b5135c2cd3dcfde6		 pdf-embedded-file PDF EmbeddedFile object 10 at offset 0x434 168 bytes
embedded_file_obj0011.bin
9bf794dd7fca876ae0a107f7700045e74e529d10c3aebfa0e63964106b862662		 pdf-embedded-file PDF EmbeddedFile object 11 at offset 0x527 440 bytes
embedded_file_obj0012.bin
d2f06f3fc6900856fe613a64a561919c8454dcbe0fdf238fb8b43e07016955ea		 pdf-embedded-file PDF EmbeddedFile object 12 at offset 0x72A 190 bytes
embedded_file_obj0014.bin
d55a018e5796111370340ad9829710916d14024efa1df54440b413ba6bada4b4		 pdf-embedded-file PDF EmbeddedFile object 14 at offset 0x835 41076 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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