Malicious PDF — malware analysis report

Static analysis result for SHA-256 0985edf47dc24845…

MALICIOUS

PDF

42.7 KB
MD5: 967ec6dce4cb481954c7414b110ef68a SHA-1: ee99e7b7687c680a95ea328af157e41b970a7420 SHA-256: 0985edf47dc24845650d14621fbe5037596d1f4958166166601b2cba8c76d63d
176 Risk Score

Malware Insights

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

The PDF file contains embedded scripts and is flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Exploit.Agent-36834'. The presence of embedded files and XFA forms suggests an attempt to exploit PDF viewer vulnerabilities for client execution. No specific document body content was available for analysis, but the embedded script payload is the primary indicator of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • ClamAV: Pdf.Exploit.Agent-36834 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36834
  • 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/
    • http://ns.adobe.com/xfdf/
    • http://www.xfa.org/schema/xfa-form/2.8/

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0008.bin
04462f810d6eacdacecc9d0a5f3f81bebc722af4415e04da19b520338f642b51		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xD7 67 bytes
embedded_file_obj0009.bin
bacc2ad9194139baf354dc5cdd014f6d3101fb879a3c6acc7c2d4388467a4135		 pdf-embedded-file PDF EmbeddedFile object 9 at offset 0x162 690 bytes
embedded_file_obj0010.bin
1c5b7971dff586207e8235b49916e2677297f244f218ae7d19c6ac9623332af8		 pdf-embedded-file PDF EmbeddedFile object 10 at offset 0x45F 100 bytes
embedded_file_obj0011.bin
ceba013fd03da8d08736ab89e75fe6a08821896f0bc2980a5931001908159934		 pdf-embedded-file PDF EmbeddedFile object 11 at offset 0x50E 578 bytes
embedded_file_obj0012.bin
d2f06f3fc6900856fe613a64a561919c8454dcbe0fdf238fb8b43e07016955ea		 pdf-embedded-file PDF EmbeddedFile object 12 at offset 0x79B 190 bytes
embedded_file_obj0014.bin
65418d98541564c94a49628c9a06903080b407dd108a278fd1f700fc0dc47948		 pdf-embedded-file PDF EmbeddedFile object 14 at offset 0x8A6 40690 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36834
Obfuscation or payload: unlikely
embedded_file_obj0015.bin
03172373f36e220deaea3baf69186e2a8bef99633879227f39b2a0b4510201ee		 pdf-embedded-file PDF EmbeddedFile object 15 at offset 0xA7E2 138 bytes

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