Malicious PDF — malware analysis report

Static analysis result for SHA-256 60b241ad3e3b4149…

MALICIOUS

PDF

42.5 KB
MD5: 348645fe4d15348816064ec78eb96a1f SHA-1: 35ef028013e220af95fdd2cc9d86cd0beb2ca4e1 SHA-256: 60b241ad3e3b4149396f2c7e2adfd5071f9262d10ae3ed7ab44c723babbd2ee8
216 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

This PDF file contains an embedded XFA form with executable script, flagged by multiple heuristics as malicious. The script is likely designed to exploit a vulnerability within the PDF viewer, leading to the execution of a secondary payload. The ClamAV detection of 'Pdf.Exploit.Agent-36830' further confirms its malicious nature.

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 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
14dc8d197093ab8ff16b8c545c599bfc2673d736e9b5b8624383497572ed7f6b		 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
dcd69010a575d271912104e7ced776d5fe372133b75df7b68b3d2d63dd09133b		 pdf-embedded-file PDF EmbeddedFile object 11 at offset 0x539 430 bytes
embedded_file_obj0012.bin
d2f06f3fc6900856fe613a64a561919c8454dcbe0fdf238fb8b43e07016955ea		 pdf-embedded-file PDF EmbeddedFile object 12 at offset 0x732 190 bytes
embedded_file_obj0014.bin
37939b52224b07d48e3e3a74cf0a84c89870540135b4d0026e7dbac72bdad2a0		 pdf-embedded-file PDF EmbeddedFile object 14 at offset 0x83D 40668 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 0xA763 68 bytes

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