Malicious PDF — malware analysis report

Static analysis result for SHA-256 63570b8ae85f6af7…

MALICIOUS

PDF

42.9 KB
MD5: 4f33d37d8da5141c323e6912f13b425c SHA-1: c474f0af5ce51c06b9c4831438a88cc6a62f45a3 SHA-256: 63570b8ae85f6af7b1401b477aff482cef9a025c9cef88fadbdac3de5dca0f07
176 Risk Score

Malware Insights

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

The sample is identified as malicious by multiple engines, including ClamAV, which detected it as Pdf.Exploit.Agent-36836. Static analysis revealed it is an XFA form PDF containing embedded script payloads. The ML classifier also flagged it with high confidence. The embedded script is likely responsible for executing the exploit.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • ClamAV: Pdf.Exploit.Agent-36836 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36836
  • 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://ns.adobe.com/xtd/
    • 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
12da7061f53ebe5332afa4c9fae256c1a881c93624b2a773ad5f265f1f591b0e		 pdf-embedded-file PDF EmbeddedFile object 9 at offset 0x162 689 bytes
embedded_file_obj0010.bin
e1ab66598406464785df1b7c3e4218452dce39c816aca3e1a181e312cbe8a05c		 pdf-embedded-file PDF EmbeddedFile object 10 at offset 0x45E 93 bytes
embedded_file_obj0011.bin
26ecf569eacfba3e3d4b4966f96c2b23425cb0264d7af209edc0b9f9a84b45ef		 pdf-embedded-file PDF EmbeddedFile object 11 at offset 0x506 525 bytes
embedded_file_obj0012.bin
6dfc2cfc739bf5cd5514e048143c782a1af7b4c86ed10bd88203471efa9b3fe7		 pdf-embedded-file PDF EmbeddedFile object 12 at offset 0x75E 389 bytes
embedded_file_obj0014.bin
05c466176de943387ac4cb58bbb062074866f546eded71010b8acd0e8af82533		 pdf-embedded-file PDF EmbeddedFile object 14 at offset 0x930 40739 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36836
Obfuscation or payload: unlikely
embedded_file_obj0015.bin
51d6d76eddb1746e412f89f4d1c1b0d620c60fb4a5641c018e93871be63968a9		 pdf-embedded-file PDF EmbeddedFile object 15 at offset 0xA89D 147 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.