Malicious PDF — malware analysis report

Static analysis result for SHA-256 4567294b1fc44799…

MALICIOUS

PDF

42.5 KB
MD5: 101cd0b8ecd7117a4c83cb61999308e4 SHA-1: 50e8a7d2e5b44663475e68b4c0e1c6ee436279ce SHA-256: 4567294b1fc447993686ffa665b411a922b75ffb497deaa4d2fb3571ca7cad6a
226 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution T1059.007 Scripting: JavaScript

This PDF file contains a high-severity XFA form with a risky executable script, as indicated by multiple critical heuristic firings including ClamAV detection for 'Pdf.Exploit.Agent-36830'. The script is embedded within the PDF stream and is designed to exploit the XFA form functionality. The primary attack pattern involves leveraging this embedded script to compromise the user's system. No specific malware family was identified, but the exploit is clearly malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • XFA form contains risky executable script high CVE related PDF_XFA_SCRIPT
    PDF embeds an XFA form whose script block contains exploit, submission/launch, or shell-execution primitives. Ordinary LiveCycle print/update scripts are left as generic XFA/JS signals unless stronger behavior is present.
  • 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/
    • http://ns.adobe.com/xfdf/
    • http://www.xfa.org/schema/xfa-form/2.8/

Extracted artifacts 7

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
d7c21241964a6b92ee6b6cd3426f9166aec2c5898e4dbd4b77d3a60183325d32		 pdf-embedded-file PDF EmbeddedFile object 9 at offset 0x14D 689 bytes
embedded_file_obj0010.bin
b9dc770324ae2a66fd1d9c8b9605e3a9ddaae9d1311dffe002d37a59fdc6e4bc		 pdf-embedded-file PDF EmbeddedFile object 10 at offset 0x449 183 bytes
embedded_file_obj0011.bin
945a3c9fb04e1b72448211b31c732e26ceda94dae99be8ae621f767e02ff544e		 pdf-embedded-file PDF EmbeddedFile object 11 at offset 0x54B 355 bytes
embedded_file_obj0012.bin
d2f06f3fc6900856fe613a64a561919c8454dcbe0fdf238fb8b43e07016955ea		 pdf-embedded-file PDF EmbeddedFile object 12 at offset 0x6F9 190 bytes
embedded_file_obj0014.bin
4f47499f6061d507a190cc3cc4c72529b1d59dcbc28ae56e536c1a7cb610fc21		 pdf-embedded-file PDF EmbeddedFile object 14 at offset 0x804 40724 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely
embedded_file_obj0015.bin
78b09463af5cd373870eae2e3e83de87b7f6b659e0d0117ab4c09d90ebb2ad95		 pdf-embedded-file PDF EmbeddedFile object 15 at offset 0xA762 68 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.