Malicious PDF — malware analysis report

Static analysis result for SHA-256 73fbd15baedb4eb4…

MALICIOUS

PDF

99.9 KB
MD5: 425e2cda2620a4302c2015ea2e8ec981 SHA-1: 806f39528e4e564e2033cfe892fd32b6caf47b85 SHA-256: 73fbd15baedb4eb4e53dcaeace2dfb01f85d4188e1cee0de5148a5ccc67d396a
136 Risk Score

Malware Insights

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

The sample is a PDF file that exploits CVE-2010-0188, a vulnerability in Adobe Reader's LibTIFF XFA image processing. The embedded XFA script is likely responsible for triggering this exploit, which allows for arbitrary code execution. The script's obfuscated nature and the embedded nature of the exploit payload suggest a downloader or dropper functionality, though the exact second-stage payload cannot be determined from the provided evidence.

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
2d8a91b3ec60294fe3e11bfb109d01584bebc66d629c498a461d496b8167d863		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 101567 bytes

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