Malicious PDF — malware analysis report

Static analysis result for SHA-256 0aca398e2f4c7468…

MALICIOUS

PDF

86.9 KB
MD5: e717e82f6b8d0787ca553e9333b4dee8 SHA-1: 0f495c25635253aa0d5a080ea5c578daf6dbde9f SHA-256: 0aca398e2f4c7468a6fb9a47b25cf77609d7aae3f8550848ca5682f69b88c255
176 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

This PDF file is flagged as malicious by multiple heuristics, including a critical detection for CVE-2010-0188, an Adobe Reader exploit targeting XFA forms. The presence of an embedded script payload and the ML classifier's high confidence score indicate that the file is designed to exploit this vulnerability to execute arbitrary code, likely for the purpose of downloading and running a secondary malicious payload. No document body text was available for analysis, but the exploit and embedded script are strong indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • Adobe Reader LibTIFF XFA image exploit — CVE-2010-0188 critical CVE likely CVE_2010_0188
    PDF contains the CVE-2010-0188 exploit template: XFA JavaScript heap-spray setup, a generated TIFF image payload, and assignment of that TIFF data to an XFA image field rawValue to trigger Adobe Reader's LibTIFF parser.
  • ClamAV: Pdf.Exploit.Dropped-78 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Dropped-78
  • 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/xfa-template/2.5/
    • http://www.xfa.org/schema/xfa-data/1.0/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0008.bin
8e42a20fd3a58bb43421c461aebef5bc59abb7ce58e69a8e7162dc6634aaf59f
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 88184 bytes