Malicious PDF — malware analysis report

Static analysis result for SHA-256 016ae80edac3e509…

MALICIOUS

PDF

42.5 KB
MD5: a42ebda3d643458ca2646da959000ed0 SHA-1: 883b46141a1e16d2e6da5f04a818a3ce89022999 SHA-256: 016ae80edac3e50903ada734c24943792443f596eeb1a3d20bdcb35c84f8d0b1
228 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious Link: Malicious File T1059 Command and Scripting Interpreter T1059.007 Command and Scripting Interpreter: JavaScript

The PDF file contains embedded XFA forms which are known to be a vector for exploiting vulnerabilities. High-severity heuristics indicate the presence of a risky executable script within the XFA form, and ClamAV detection confirms this as Pdf.Exploit.Agent-36836. The script is likely designed 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 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
24d5d8ac9ae2eb94f0ee3dc857d65c80c906e217bb8f4621013a90b6a9574c39		 pdf-embedded-file PDF EmbeddedFile object 9 at offset 0x14D 690 bytes
embedded_file_obj0010.bin
c259a88fa7009eac9e74e159f6844afae066e629d097960200bbbe394cbffcee		 pdf-embedded-file PDF EmbeddedFile object 10 at offset 0x44A 149 bytes
embedded_file_obj0011.bin
2b2db871dbd0a461df40c7c1122125f3214860cff5ea8225d6b42a14d7829e1b		 pdf-embedded-file PDF EmbeddedFile object 11 at offset 0x52A 379 bytes
embedded_file_obj0012.bin
d2f06f3fc6900856fe613a64a561919c8454dcbe0fdf238fb8b43e07016955ea		 pdf-embedded-file PDF EmbeddedFile object 12 at offset 0x6F0 190 bytes
embedded_file_obj0014.bin
04ee64ae44019d63c2f2045357488ef316f7c3b7b8db931a056186c00df8e64d		 pdf-embedded-file PDF EmbeddedFile object 14 at offset 0x7FB 40695 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 0xA73C 68 bytes

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