Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbda5958543418f3…

MALICIOUS

PDF

42.5 KB
MD5: 4b4c1e15c7a91d8e2bcae2ce6e2d8149 SHA-1: f1317243bf51d2fd630f241b7f2c3cfe40cdf178 SHA-256: cbda5958543418f3ef45aabe59c26ba1cda149a1e2d492a7b0ceb3b029b8c4f9
156 Risk Score

Malware Insights

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

The PDF document was detected by ClamAV as Pdf.Exploit.Agent-36830, indicating it contains an exploit. The 'PDF_EMBEDDED_SCRIPT_PAYLOAD' heuristic further suggests the presence of malicious script content within the PDF stream, likely intended to download and execute a second-stage payload. The embedded file artifact also points to a potential dropper mechanism.

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/xfa-template/2.5/
    • http://www.xfa.org/schema/xfa-data/1.0/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0008.bin
40e0f663b81a6b70694683b9f5e3ae1329e3427974ba803f32ced39689af4e0f		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42756 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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