Malicious PDF — malware analysis report

Static analysis result for SHA-256 9957a42545d7a4e3…

MALICIOUS

PDF

99.7 KB
MD5: 9526edf3378b22b0615970a58e910724 SHA-1: acefaf5cc4fdee666e32155c2dd2fa9ac8d97bde SHA-256: 9957a42545d7a4e34a86d104f8a8d7a32c95625d1defa01afe67cd39e8e32c62
136 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution: Malicious Attachment T1059.001 Command and Scripting Interpreter: PowerShell T1204.001 Malicious File: User Execution: Malicious Link

The sample is a PDF file that exploits CVE-2010-0188, a vulnerability in Adobe Reader related to XFA forms. This exploit likely leads to the execution of arbitrary code. The PDF contains embedded scripts and an embedded file, indicating a multi-stage attack. The embedded URLs are related to XFA schemas, but their reputation is unknown or benign, suggesting the malicious payload is likely delivered via the embedded file or script.

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
7bc46b73fb0a1e9206dbe045ddb738403c80e60d7654cb0b8b72f202d70c21e3		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 101375 bytes

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