Malicious PDF — malware analysis report

Static analysis result for SHA-256 5051ef12fb981198…

MALICIOUS

PDF

58.0 KB Created: 2011-07-18 09:51:43 Authoring application: PhpScriptCreator (via Some Producer) First seen: 2013-09-01
MD5: 864ef44e7c66717cd13bdc739f2d5230 SHA-1: 856649a122f60d9df90438283b7db084bf4fb725 SHA-256: 5051ef12fb981198b9ef04c070b221838a1a878edd38b7d6b2fe68916ba83f43
74 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of malicious intent, including an embedded JavaScript payload. The heuristic 'PDF_EMBEDDED_SCRIPT_PAYLOAD' and the presence of a large JavaScript file ('stream_001_off0000035f.js') strongly suggest that this script is designed to download and execute a second-stage payload. The XFA form heuristic also indicates potential for embedded actions. Without further analysis of the script's content, the specific family remains unknown.

Machine Learning

  • Nyx PDF Classifier clean score 0.2029

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.
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • Embedded script payload in PDF stream info 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.
  • 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.
  • 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://www.15min.lt/en/article/politics/almost-50-violations-reported-during-early-vote-in-lithuania-s-general-elections-526-263732 In PDF document text
    • http://kauno.diena.lt/naujienos/lietuva/rinkimu-diena-policija-gavo-164-pranesimus-apie-galimus-pazeidimus-454516In PDF document text
    • http://ns.adobe.com/xdp/\In PDF document text
    • http://www.xfa.org/schema/xfa-template/2.5/In PDF document text
    • http://www.xfa.org/schema/xfa-data/1.0/In PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_001_off0000035f.js decompressed-pdf-stream PDF FlateDecoded stream at offset 0x35F 56431 bytes
SHA-256: cfdfa10023824148576005979656dd1e4c85d14df52a11da7f060f8e938ab5df
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).

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