Malicious PDF — malware analysis report

Static analysis result for SHA-256 2896d9931ff118f8…

MALICIOUS

PDF

42.8 KB
MD5: ff27829e2e2f11c1c71fe09a707d8e03 SHA-1: 0afb440d205594d4100e0cb29072da7d3f2a0c7d SHA-256: 2896d9931ff118f8a39b1238af6605cbc830414955cc7473f74af36d0e54ca26
196 Risk Score

Malware Insights

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

The PDF file contains XFA forms with embedded executable scripts, as indicated by multiple high and critical heuristic firings including ClamAV detection for Pdf.Exploit.Agent-36836. The embedded script payload is designed to exploit vulnerabilities within the XFA form processing. While the exact script functionality is obfuscated, the presence of embedded scripts and the ClamAV signature strongly suggest a malicious intent to deliver a payload.

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
49bfcff32aca34e6021860de3298a5fb28c5158bf8f4c76b72edea94033fbce6		 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
ebded9663d60c76321ad174dea592c67ddf2b0ac01c667683317416d1e9618a0		 pdf-embedded-file PDF EmbeddedFile object 11 at offset 0x512 413 bytes
embedded_file_obj0012.bin
d2f06f3fc6900856fe613a64a561919c8454dcbe0fdf238fb8b43e07016955ea		 pdf-embedded-file PDF EmbeddedFile object 12 at offset 0x6FA 190 bytes
embedded_file_obj0014.bin
69d3eb3596480ba0238ae2e53b358ec9f05440b74f6d241ce8a804d574129741		 pdf-embedded-file PDF EmbeddedFile object 14 at offset 0x805 41083 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 0xA8CA 68 bytes

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