Malicious PDF — malware analysis report

Static analysis result for SHA-256 883f791b79a54917…

MALICIOUS

PDF

5.2 KB Created: 2011-06-11 17:19:01 Authoring application: val
MD5: 38d74c7ae502606767a0f0feb550f8ec SHA-1: ced608d69e75256c1ae95f0bfda7fe4fcfea72c5 SHA-256: 883f791b79a54917846343110af97ff1f44c573b0c08121f3bd8d2fb4cc7892b
100 Risk Score

Malware Insights

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

The PDF file contains an embedded JavaScript file, identified as stream_002_off000002f7.js. Heuristics indicate that this file exploits CVE-2010-0188, a vulnerability in Adobe Reader related to LibTIFF XFA images. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload. The document body is not human-readable, suggesting it is primarily a container for the exploit.

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.
  • 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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000002f7.js
0aeb185f16d5597afce5cca868cafc43a3764c27a422b20c890415104a07b5ca
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F7 64766 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).