Malicious PDF — malware analysis report

Static analysis result for SHA-256 2055bee01f2a5848…

MALICIOUS

PDF

42.4 KB
MD5: 45f28cddd36c72fc74f056cf98df6318 SHA-1: 1af6ca69d3421012b9e0730f7decfeaa93b6a3ef SHA-256: 2055bee01f2a58485b951aa4b7c023f48044901561c4ddc070402233c5138fe5
196 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1059 Command and Scripting Interpreter

The PDF file contains embedded XFA forms with risky executable scripts, as indicated by multiple high and critical heuristic firings. ClamAV detection confirms this as a known exploit, specifically 'Pdf.Exploit.Agent-36836'. The embedded script is likely designed to download and execute a second-stage payload, leveraging the XFA vulnerability to bypass standard PDF security measures. No specific malware family could be identified from the available evidence.

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-36836 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36836
  • 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
ff0c1d9219be46daf14278229f5b40e9e850296a3ddb4a25f7e01e7ce1365776		 pdf-embedded-file PDF EmbeddedFile object 9 at offset 0x14D 690 bytes
embedded_file_obj0010.bin
9b3e3137f794b4b7749fdedcd46db5dc4d1f380440711c5edf7fc00a7458da87		 pdf-embedded-file PDF EmbeddedFile object 10 at offset 0x44A 125 bytes
embedded_file_obj0011.bin
552ebb3fe8ea8812cddbdc430d1ca386a5320ada40f360e9576660df54eb4bae		 pdf-embedded-file PDF EmbeddedFile object 11 at offset 0x512 391 bytes
embedded_file_obj0012.bin
d2f06f3fc6900856fe613a64a561919c8454dcbe0fdf238fb8b43e07016955ea		 pdf-embedded-file PDF EmbeddedFile object 12 at offset 0x6E4 190 bytes
embedded_file_obj0014.bin
b23525df39e3f1827333b05c07f5093fd6f741ebcf98e04b1f84effaa9c79f1e		 pdf-embedded-file PDF EmbeddedFile object 14 at offset 0x7EF 40645 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36836
Obfuscation or payload: unlikely
embedded_file_obj0015.bin
78b09463af5cd373870eae2e3e83de87b7f6b659e0d0117ab4c09d90ebb2ad95		 pdf-embedded-file PDF EmbeddedFile object 15 at offset 0xA6FE 68 bytes

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