Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6be77cdb595ed44…

MALICIOUS

PDF

42.8 KB
MD5: 1cf3383695f32de50620451842bda706 SHA-1: 78ae29d703887e6b3e764b1af9ee45494c877242 SHA-256: b6be77cdb595ed448c93d7d45531fc511abf89c5dfb568b9336d1869eb848d06
226 Risk Score

Malware Insights

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

The PDF file contains embedded executable scripts within an XFA form, a known vector for exploitation. Heuristics indicate a high likelihood of malicious script execution, and ClamAV detection confirms this, identifying the file as Pdf.Exploit.Agent-36830. The embedded script is likely designed to download and execute a second-stage payload.

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
a30b1021076a04066d8b37a6b30d57f7dc8134e524dff5cc3112dc8ec7fb8015		 pdf-embedded-file PDF EmbeddedFile object 9 at offset 0x14D 689 bytes
embedded_file_obj0010.bin
982e20dbb278e7bb9167a49d41bca4eba40d0f35d12088fdf01e6cb6fead89b4		 pdf-embedded-file PDF EmbeddedFile object 10 at offset 0x449 165 bytes
embedded_file_obj0011.bin
85f31d185adc13f13f157a7fc5101a8f0384a214f57561bb08f7b47e1f32d7cd		 pdf-embedded-file PDF EmbeddedFile object 11 at offset 0x539 437 bytes
embedded_file_obj0012.bin
d2f06f3fc6900856fe613a64a561919c8454dcbe0fdf238fb8b43e07016955ea		 pdf-embedded-file PDF EmbeddedFile object 12 at offset 0x739 190 bytes
embedded_file_obj0014.bin
69076e2cbe3d37ef62c73fe4b478726a5a70b2571df41de494dc0a7052a35753		 pdf-embedded-file PDF EmbeddedFile object 14 at offset 0x844 40951 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 0xA885 68 bytes

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