Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb6f61c71cec8de9…

MALICIOUS

PDF

44.1 KB
MD5: 07bea46655876d1b921e73ef6f6eb3f8 SHA-1: 66e3d78abecbff995347b9ba9f6b01023ad1ba16 SHA-256: cb6f61c71cec8de94d825e2d089efd9eb07036e1c6bde3701aca9fd75978ad52
106 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, flagged by multiple high-severity heuristics including PDF_XFA_SCRIPT and ML_NYX_PDF_MALICIOUS. This script is likely responsible for exploiting a vulnerability within the PDF viewer to execute malicious code. The embedded nature and the XFA form structure suggest a delivery mechanism for a secondary payload. No specific family could be identified.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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 0xE2 46 bytes
embedded_file_obj0009.bin
13362cfe64eb01bf0a399d7f0ba5fc7ed5c8c8dd5ac7e9a89dcdf8e7ceb5e56b		 pdf-embedded-file PDF EmbeddedFile object 9 at offset 0x15A 656 bytes
embedded_file_obj0010.bin
eae3ad365f6c7aeb3037e763db80dbc8f3df68a93b681dbd1e32ed42cc980301		 pdf-embedded-file PDF EmbeddedFile object 10 at offset 0x435 153 bytes
embedded_file_obj0011.bin
339eec0a86863e94acadb36d5cc9bc86ed5796d8b90f4185969779bae3b6b912		 pdf-embedded-file PDF EmbeddedFile object 11 at offset 0x519 389 bytes
embedded_file_obj0012.bin
e91adafe4323fbdd4002682aad948eaa165718622cea8d515bb0788d4b95260c		 pdf-embedded-file PDF EmbeddedFile object 12 at offset 0x6E9 162 bytes
embedded_file_obj0014.bin
524b0dfaa22e18eb1e8600511f694293cb0de5ba8cfb3705bc6f58612ab87f36		 pdf-embedded-file PDF EmbeddedFile object 14 at offset 0x7D6 42339 bytes
embedded_file_obj0015.bin
03172373f36e220deaea3baf69186e2a8bef99633879227f39b2a0b4510201ee		 pdf-embedded-file PDF EmbeddedFile object 15 at offset 0xAD83 138 bytes

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