Malicious PDF — malware analysis report

Static analysis result for SHA-256 811401180f353072…

MALICIOUS

PDF

42.5 KB
MD5: 72c4de70878c4a5ac8c29d2455c15fc8 SHA-1: e732fed7341a05722d793afbe6c7a86425cbae09 SHA-256: 811401180f353072574fa55ab9800d859e814858d6c0aa7fb497ec2a0330365e
216 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF document contains XFA forms with executable scripts, a critical finding that indicates exploitation. ClamAV detected this file as Pdf.Exploit.Agent-36836, suggesting it's a known exploit. The embedded script likely attempts 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-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 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 script payload in PDF stream low 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 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
d5872aff0b63acfe96e0bc33facc02c9efb8693eeeb5f4c03181ec0ba913ed06		 pdf-embedded-file PDF EmbeddedFile object 9 at offset 0x14D 688 bytes
embedded_file_obj0010.bin
50e52033eae7706a575698d3f5a6d0bf05a5f6e75efd829e6ddba4bc9dfb8167		 pdf-embedded-file PDF EmbeddedFile object 10 at offset 0x448 139 bytes
embedded_file_obj0011.bin
3a394cc1e4631e78a9983968e0690ab3dc33a9ce7e9b190e3aaf26e338a9e7e7		 pdf-embedded-file PDF EmbeddedFile object 11 at offset 0x51E 387 bytes
embedded_file_obj0012.bin
d2f06f3fc6900856fe613a64a561919c8454dcbe0fdf238fb8b43e07016955ea		 pdf-embedded-file PDF EmbeddedFile object 12 at offset 0x6EC 190 bytes
embedded_file_obj0014.bin
b797922b7cf58eeefc4a46793fd520587137346a7664b936763a1b85aba53509		 pdf-embedded-file PDF EmbeddedFile object 14 at offset 0x7F7 40750 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 0xA76F 68 bytes

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