Malicious PDF — malware analysis report

Static analysis result for SHA-256 be9ceb5315271032…

MALICIOUS

PDF

42.7 KB
MD5: d8e78988397cf3c3c0d34a93ba4b0481 SHA-1: bcf89e7d300d28d13c820ad07a1f34208fa81cd2 SHA-256: be9ceb531527103220a8587e4d3cd708725bcc568267c47e3f7c66ec7c3f3031
226 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1059.007 JavaScript

This PDF file was flagged as malicious by multiple heuristics, including PDF_XFA_SCRIPT and ML_NYX_PDF_MALICIOUS, and detected by ClamAV as Pdf.Exploit.Agent-36836. The presence of XFA forms with risky executable scripts indicates an attempt to exploit vulnerabilities within the PDF reader. The embedded file detections further support the malicious nature of this document.

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
aa889e96eb43cbcd481f6e9793813ac97f4ceabbd91c92822741222b024d5c8d		 pdf-embedded-file PDF EmbeddedFile object 9 at offset 0x14D 690 bytes
embedded_file_obj0010.bin
9b3e3137f794b4b7749fdedcd46db5dc4d1f380440711c5edf7fc00a7458da87		 pdf-embedded-file PDF EmbeddedFile object 10 at offset 0x44A 125 bytes
embedded_file_obj0011.bin
8370f2c28fd039e534433c53b1a24532ee266af99c2b8fae3ff16173f3107c6b		 pdf-embedded-file PDF EmbeddedFile object 11 at offset 0x512 397 bytes
embedded_file_obj0012.bin
d2f06f3fc6900856fe613a64a561919c8454dcbe0fdf238fb8b43e07016955ea		 pdf-embedded-file PDF EmbeddedFile object 12 at offset 0x6EA 190 bytes
embedded_file_obj0014.bin
63a49ce6b2d6aad8667f9d8ac0dc4fd4a52201677b40de57d3c605c3bf3187b9		 pdf-embedded-file PDF EmbeddedFile object 14 at offset 0x7F5 40909 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 0xA80C 68 bytes

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