Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b0391740f510cee…

MALICIOUS

PDF

78.8 KB
MD5: 0c0d4808ede7972bb09c683a028d7f1a SHA-1: 771f1e846b826d14cc47e2f0ebde045e4ba371f3 SHA-256: 3b0391740f510ceeb777c787541369952ee08103e71d35d95e2c6dd92bc51238
136 Risk Score

Malware Insights

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

The sample is a PDF document that exploits CVE-2010-0188, a vulnerability in Adobe Reader related to LibTIFF XFA image processing. The embedded XFA form contains executable script, indicating an attempt to leverage this vulnerability for initial code execution. The script's purpose is unclear due to obfuscation, but it is likely designed to download and execute a second-stage payload. The presence of embedded URLs, though not directly malicious, suggests potential communication channels.

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
797bb871b622f9137251a72faf2c911f14778158eadd86fe24ce88766e64dea9		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 79963 bytes

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