Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef1264a4a3dba998…

MALICIOUS

PDF

76.2 KB
MD5: 398c7444a7ccf7e97de1f191c1f4ede5 SHA-1: 59608792ee444d1a509e9ffa70f9e092fae81d4a SHA-256: ef1264a4a3dba998e55099e90731946a721f53ebb7a391e7e1dd98c0adf08976
196 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1059.001 PowerShell

This PDF file exploits CVE-2010-0188, a vulnerability in Adobe Reader's handling of XFA forms. The critical heuristic firings indicate that the file contains an embedded script payload designed to be executed by the XFA form. This script is likely responsible for downloading and executing a second-stage payload, as suggested by the ClamAV detection of 'Pdf.Exploit.Dropped-78'. The embedded file artifact further supports the payload delivery mechanism.

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.Dropped-78 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Dropped-78
  • 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
853f190a5e2771379c080b3e4bf57254c3d75adadb1fe0a4b3d031b31d47de61		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 77263 bytes

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