Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ba2088c9b01344d…

MALICIOUS

PDF

50.7 KB
MD5: ddbf2164bfc26f84f1e1f166a98df166 SHA-1: 34ac82511dff51f8c9eac66c8763edf9772b62cd SHA-256: 5ba2088c9b01344d2d4c22c6b8d9ee66ac163d1e9d4bf65dc7b1d4a9fcf04ac6
176 Risk Score

Malware Insights

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

The PDF file contains an embedded XFA form and triggers the CVE-2010-0188 exploit, indicating it's designed to execute code upon opening in a vulnerable Adobe Reader version. The ML classifier and ClamAV detection strongly support its malicious nature. The embedded file and script payload markers suggest it's a downloader for further malicious activity.

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.Agent-6136306-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-6136306-0
  • 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
e21f279ebbe63cc8d4f257f21c21f60a583fb224b11873de1e97f44cb2fa2df7		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 51111 bytes

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