Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb5d77413415f01f…

MALICIOUS

PDF

50.6 KB
MD5: eb869887652252d89c3366140df76c6c SHA-1: dec92233d9dda38cc2ddc3d41a81876074d7a752 SHA-256: fb5d77413415f01ff3b4562449543380b2de445cd38df55d3d8bca63c99dcc71
198 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.002 Spearphishing Attachment T1204 User Execution: Malicious File

The PDF file contains embedded XFA (XML Forms Architecture) data which is known to be a vector for exploits. Specifically, the heuristic 'CVE_2010_0188' indicates exploitation of the LibTIFF vulnerability in Adobe Reader. The embedded script payload further confirms malicious intent. The ClamAV detection 'Pdf.Exploit.Agent-6136306-0' also supports this assessment.

Heuristics 7

  • 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.
  • XFA form contains executable script high CVE related PDF_XFA_SCRIPT
    PDF embeds an XFA form whose dataset contains a <script> or <xfa:script> block — XFA scripting has been the exploit primitive for several Adobe Reader RCEs (CVE-2010-0188 family, CVE-2018-4901, and others). Plain XFA without scripts is far less risky.
  • ClamAV: Pdf.Exploit.Agent-6136306-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-6136306-0
  • Embedded script payload in PDF stream medium 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 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 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
dc126455790e74d6a1d86f95ae88108b1a3a123bb059919b596dad8976c41b5f		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 51009 bytes

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