Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bc11b128a23e343…

MALICIOUS

PDF

7.8 KB Created: 2009-02-23 22:53:59 UTC Authoring application: Win2PDF 3.40.1 http://www.win2pdf.com (via PDFlib 3.03 (Win32))
MD5: 420eccfb218eb1ed16135f4b194a0dc5 SHA-1: a093b5785f36efb62c8d99f9d54292c919540453 SHA-256: 1bc11b128a23e343c7f7924ec08a06da7ed2c857f1d89518c3271f8a4dbc28f7
156 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript that utilizes the `util.printf` function, indicating exploitation of CVE-2008-2992. This JavaScript is likely designed to download and execute a second-stage payload. The presence of `unescape()` further suggests obfuscation of malicious code. No specific malware family could be confidently identified.

Heuristics 6

  • util.printf — CVE-2008-2992 critical CVE exact CVE_2008_2992
    PDF JavaScript calls util.printf() — CVE-2008-2992 is a stack buffer overflow in Adobe Reader triggered by a long format-specifier argument. Widely exploited in the wild after disclosure. (matched in decompressed stream)
  • unescape() call high PDF_UNESCAPE
    unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
  • Suspicious extracted artifact high 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.
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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.win2pdf.com
    • http://www.win2pdf.com)/Producer(PDFlib
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/xap/1.0/
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/mm/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0008_000.js
cfd23d30e0ba1db7ae8cc6b2bee18e17d9ac075670f9584777c0a305497570e4		 pdf-javascript-stream PDF /JS object 8 at offset 0x19BA 2152 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

Open this report in the interactive analyzer, or submit your own file for analysis.