Malicious PDF — malware analysis report

Static analysis result for SHA-256 26b9db0efb75c37d…

MALICIOUS

PDF

5.2 KB Created: 2011-06-11 17:19:01 Authoring application: G0A
MD5: ade77bdec4db16c22f6e180d9a072589 SHA-1: 82fca2ba163aa87c56ac1fc721c6f450bbc6fc11 SHA-256: 26b9db0efb75c37d8a1eeeb04fa6790374d1029a4d1a8b393fce0aa80695dfc9
100 Risk Score

Malware Insights

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

The PDF file contains an embedded JavaScript payload that exploits CVE-2010-0188 in Adobe Reader. The heuristic 'CVE_2010_0188' directly indicates this vulnerability is targeted. The embedded JavaScript, identified as 'stream_002_off00000306.js', is the likely second-stage payload executed by the exploit. The file's authoring application and creation date suggest it may be part of a targeted campaign.

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_off00000306.js
1220df292b82ee57d92158367f0c5f1b5e915ea0a43080abf9849fddc50acdbf
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x306 65215 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).