Malicious PDF — malware analysis report

Static analysis result for SHA-256 bff436c7fcbfa2a5…

MALICIOUS

PDF

5.1 KB Created: 2011-04-05 23:46:28 Authoring application: bub lob
MD5: 7ddc597afaf1d6949fec0ebba86ed3f7 SHA-1: 7ad40abf31a2f442b4745e6f61098e3ba8f3d256 SHA-256: bff436c7fcbfa2a5af0f4e0af885b08b9fcda9888b16e89a4cfed5f7bf56e2e9
98 Risk Score

Malware Insights

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

The PDF file contains an embedded JavaScript payload that exploits CVE-2010-0188 in Adobe Reader. The heuristic firings indicate a critical vulnerability exploit and an embedded script payload. The extracted JavaScript file, stream_001_off00000324.js, is likely responsible for downloading and executing a second-stage payload.

Heuristics 5

  • 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
  • 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_001_off00000324.js
97bed9e229590f86531741c2e23accdcc8e866ecf61364faf74ca5554af88cb8
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x324 50788 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).