Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7ee70023a7a95b7…

MALICIOUS

PDF

44.5 KB
MD5: 132218298062ae0485a5a8a4d5945a9c SHA-1: cf748937bafaab470361968bf649c57b52813a7c SHA-256: b7ee70023a7a95b7ff6f3fa82bd312e9b96205b836d6d83c6b0e1a21c77afb39
186 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious File T1204.002 Malicious File: User Execution - Malicious File

The file is a PDF document flagged as malicious by multiple engines, including ClamAV with the signature 'Pdf.Exploit.Agent-36830'. Heuristics indicate the presence of embedded scripts and an embedded file payload, suggesting it's designed to exploit PDF vulnerabilities. The ML classifier also strongly indicates maliciousness. The embedded URLs are related to XFA forms, which can be a vector for exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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 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/

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0008.bin
0a2224c4023b216235b61c3fc4dd17bbfac1ab23a545687f51b97604cf654712		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xD5 46 bytes
embedded_file_obj0009.bin
58481460d0e5b9442c3b8f27ae56f7aa3969be756775de0d79c8d445a871b6f0		 pdf-embedded-file PDF EmbeddedFile object 9 at offset 0x14D 689 bytes
embedded_file_obj0010.bin
69650a61091a018036679a3439cc6a018b6a91ebe9e0e3a6b36ceb04d6491a4f		 pdf-embedded-file PDF EmbeddedFile object 10 at offset 0x449 160 bytes
embedded_file_obj0011.bin
8b65b78b551af6fc25d220cf94cf3210a8e0952b9d56863b5043c03ec5ef78ab		 pdf-embedded-file PDF EmbeddedFile object 11 at offset 0x534 469 bytes
embedded_file_obj0012.bin
d2f06f3fc6900856fe613a64a561919c8454dcbe0fdf238fb8b43e07016955ea		 pdf-embedded-file PDF EmbeddedFile object 12 at offset 0x754 190 bytes
embedded_file_obj0014.bin
9f718975f9faaf8fe41f9e83be36f4bbf07fdc34492490630742935d1f43d6e3		 pdf-embedded-file PDF EmbeddedFile object 14 at offset 0x85F 42766 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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