Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c866a848f9e2928…

MALICIOUS

PDF

42.9 KB
MD5: 558c14e59ced210fd78a56ce0fba3f7c SHA-1: 919ee833c5a24d3f845d3372d64af8da02572f77 SHA-256: 1c866a848f9e2928c9e57e93c792d51edada5425acecf8410f8724ceeed51440
156 Risk Score

Malware Insights

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

The critical ClamAV detection 'Pdf.Exploit.Agent-36830' strongly indicates this PDF file is designed to exploit a vulnerability. The presence of embedded script payloads and multiple embedded files further supports this, suggesting the PDF acts as a dropper for a secondary malicious artifact. The document body content appears to be obfuscated or malformed, preventing a clear understanding of the lure, but the technical indicators point to exploit delivery.

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
acd8fc5b9426c81693ab26adc0c8c931724dd641e7807402d8545450eaba5358		 pdf-embedded-file PDF EmbeddedFile object 9 at offset 0x14D 689 bytes
embedded_file_obj0010.bin
0fe7596619d7974f48bb0928a6efec8cf5bea691a6bfb71cb5fbc41c3ca73638		 pdf-embedded-file PDF EmbeddedFile object 10 at offset 0x449 168 bytes
embedded_file_obj0011.bin
97b36e17879f36e6036e32974619ad30ce93f47710af0acd24ec3f32ceb76e81		 pdf-embedded-file PDF EmbeddedFile object 11 at offset 0x53C 436 bytes
embedded_file_obj0012.bin
d2f06f3fc6900856fe613a64a561919c8454dcbe0fdf238fb8b43e07016955ea		 pdf-embedded-file PDF EmbeddedFile object 12 at offset 0x73B 190 bytes
embedded_file_obj0014.bin
6ecbde5b5f93df05538a2580290c1f355e63d127e05f40fb9185965e14edfa39		 pdf-embedded-file PDF EmbeddedFile object 14 at offset 0x846 41155 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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