Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5cdd8e23d086e77…

MALICIOUS

PDF

79.0 KB
MD5: a19b355933d236c0d20b6e2cc5ba4d56 SHA-1: 074ced0cbfe12742f858b7837f7d67f82b877203 SHA-256: f5cdd8e23d086e77a82e24aea70e1fe019f61413a7f0b57226ad4e5b2dc8d703
136 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.001 PowerShell

This PDF file is malicious, leveraging the CVE-2010-0188 vulnerability in Adobe Reader's LibTIFF component. The XFA form contains an executable script that is likely responsible for exploiting this vulnerability. The embedded script payload and the critical heuristic firing for CVE-2010-0188 strongly indicate an exploit attempt to gain code execution, probably to download further malware.

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.
  • 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.
  • 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
6c28db4069e991d9ea537f92c65cb4d2aad809e2292a9a7dd299dc1aeeeed186		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 80099 bytes

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