Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bde1120437fbab9…

MALICIOUS

PDF

93.2 KB
MD5: 8fd71a0394b89f959d8c41f2182f030b SHA-1: 6b6ce9bb53a974bd2a3acb83378a60060e31aa64 SHA-256: 5bde1120437fbab9fcb691fb451c47cc2d1dd45b081e1f49f07a2f2816951187
176 Risk Score

Malware Insights

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

The file is a PDF that triggers the CVE-2010-0188 exploit, which is known to be used for client-side code execution. The presence of embedded script markers and an embedded file further suggests that this exploit is used to download and execute a secondary payload. The benign URLs present do not appear to be related to the malicious functionality.

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
6b3aa59c1e4f13c22059188710d031a4de938fae83926e50d4717e5658c3ea43		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 94684 bytes

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