Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c436d353498067a…

MALICIOUS

PDF

42.7 KB
MD5: 7231c339874cfa0cc618179e548d134b SHA-1: 258a0c9e70b541b552ab3d91f422017b3d14cd5e SHA-256: 2c436d353498067a7ad498a5b290749a3364e83d44e818a8ec047d1ab0a4b919
196 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious File T1204.002 Malicious File: User Execution T1059 Command and Scripting Interpreter

The PDF file contains a high-severity XFA form with risky executable script, indicating an attempt to exploit a vulnerability. ClamAV detection as 'Pdf.Exploit.Agent-36836' further confirms its malicious nature. The embedded script is likely designed to download and execute a second-stage payload, a common technique for exploiting PDF vulnerabilities.

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
53b8423fa06edfac4a9d47a62d83a266d9bfc41d090ff2f171dc47d176773312		 pdf-embedded-file PDF EmbeddedFile object 9 at offset 0x14D 686 bytes
embedded_file_obj0010.bin
c259a88fa7009eac9e74e159f6844afae066e629d097960200bbbe394cbffcee		 pdf-embedded-file PDF EmbeddedFile object 10 at offset 0x446 149 bytes
embedded_file_obj0011.bin
b6d2c3ce718e4b0e285ce6fa5a0560b50ff1d0c617286f52f917a021ae4326e2		 pdf-embedded-file PDF EmbeddedFile object 11 at offset 0x526 381 bytes
embedded_file_obj0012.bin
d2f06f3fc6900856fe613a64a561919c8454dcbe0fdf238fb8b43e07016955ea		 pdf-embedded-file PDF EmbeddedFile object 12 at offset 0x6EE 190 bytes
embedded_file_obj0014.bin
251776ed261631537f0e1461d4651aad71a48d67b738b23126214c3f9382612f		 pdf-embedded-file PDF EmbeddedFile object 14 at offset 0x7F9 40936 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 0xA82B 68 bytes

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