Malicious PDF — malware analysis report

Static analysis result for SHA-256 762fad519161ce71…

MALICIOUS

PDF

42.7 KB
MD5: 5e4875b57bd467fb08fb40f8c020db29 SHA-1: b0f0de782e1ffe68f2a200207a0ff9f20dbc9357 SHA-256: 762fad519161ce71647a0a929a80939e3de5c4b53695cc2c22bce8393793dd25
176 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.007 JavaScript

The sample is identified as malicious by multiple heuristics, including a critical ClamAV detection for 'Pdf.Exploit.Agent-36830'. The presence of embedded script payloads and embedded files within the PDF structure strongly suggests an exploit attempt. The ML classifier output of 0.999994 further reinforces the malicious nature of the file, indicating it likely attempts to execute arbitrary code upon opening.

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 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 script payload in PDF stream low 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 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 0xC6 46 bytes
embedded_file_obj0009.bin
46db293027381eeaa175d249be3d9e7207c9f88c39ab64e18983f97626d33c21		 pdf-embedded-file PDF EmbeddedFile object 9 at offset 0x13C 689 bytes
embedded_file_obj0010.bin
69650a61091a018036679a3439cc6a018b6a91ebe9e0e3a6b36ceb04d6491a4f		 pdf-embedded-file PDF EmbeddedFile object 10 at offset 0x438 160 bytes
embedded_file_obj0011.bin
43a1ca691bd2690b5bcf8529e27e367f9b95041f6577ee575a4baeb9bd225004		 pdf-embedded-file PDF EmbeddedFile object 11 at offset 0x523 461 bytes
embedded_file_obj0012.bin
d2f06f3fc6900856fe613a64a561919c8454dcbe0fdf238fb8b43e07016955ea		 pdf-embedded-file PDF EmbeddedFile object 12 at offset 0x73B 190 bytes
embedded_file_obj0014.bin
6a035942cbb3f062ed45c4e54025f06915afca5ac18b614cc00d7c9440cf07c9		 pdf-embedded-file PDF EmbeddedFile object 14 at offset 0x846 40869 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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