Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b2108d29662a14a…

MALICIOUS

PDF

42.6 KB
MD5: 9f7116e84bce9e179423fdbb97ef9fae SHA-1: 7978134c314696c9bc9305d141782cc88b5dbf9a SHA-256: 4b2108d29662a14a4205f952a12db6384580f3bb5db947d30156d6e83a093940
186 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious Link: Malicious File

The PDF was flagged by multiple heuristics, including ML classification and ClamAV detection, indicating it contains malicious content. The presence of embedded script payloads and embedded files strongly suggests it's designed to exploit vulnerabilities and deliver a secondary payload. The ClamAV detection name 'Pdf.Exploit.Agent-36830' is included as a primary IOC.

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 0xD7 46 bytes
embedded_file_obj0009.bin
30a3cc2fae677da23745499e1c26540edccfc83187b031a687bac67efebdea21		 pdf-embedded-file PDF EmbeddedFile object 9 at offset 0x14D 685 bytes
embedded_file_obj0010.bin
de913a067c1e5a47831f1eba0ee72b663ccd0a38727b4b1cba1f8d6e7ca84cda		 pdf-embedded-file PDF EmbeddedFile object 10 at offset 0x445 165 bytes
embedded_file_obj0011.bin
c458887c94e489825bb4c82583f5eb87e4281262fd9937278b72299324148dd5		 pdf-embedded-file PDF EmbeddedFile object 11 at offset 0x535 425 bytes
embedded_file_obj0012.bin
d2f06f3fc6900856fe613a64a561919c8454dcbe0fdf238fb8b43e07016955ea		 pdf-embedded-file PDF EmbeddedFile object 12 at offset 0x729 190 bytes
embedded_file_obj0014.bin
1683fb5bfd7a44dcf5625636b82dea38e3365f4394d6f481a440c8cdbdfacafc		 pdf-embedded-file PDF EmbeddedFile object 14 at offset 0x834 40820 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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