Malicious PDF — malware analysis report

Static analysis result for SHA-256 2102c1cc04bb9d0f…

MALICIOUS

PDF

507.2 KB Created: 2008-11-20 09:16:01 +05:30 Authoring application: Acrobat PDFMaker 7.0.7 for Word (via Acrobat Distiller 7.0.5 (Windows))
MD5: 32bd217a0c080725155606c4fd09a3ed SHA-1: 53ea5abb25f0e27dfd039bcd32dbe5498037acbb SHA-256: 2102c1cc04bb9d0fcd2c85331b1c2123ba5b4db92332ae2063ee83471beac994
238 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 JavaScript/JScript T1204.002 Malicious File

This PDF file contains embedded JavaScript that leverages the CVE-2009-0927 vulnerability (Collab.getIcon exploit). The presence of JavaScript actions and streams, along with the specific exploit detection, indicates a malicious intent to compromise the user's system. The ClamAV detection further confirms its malicious nature. The primary attack vector appears to be exploiting a known PDF reader vulnerability to execute arbitrary code.

Heuristics 8

  • Collab.getIcon — CVE-2009-0927 critical CVE exact CVE_2009_0927
    PDF JavaScript calls Collab.getIcon — CVE-2009-0927 is a stack buffer overflow in Adobe Reader triggered by Collab.getIcon() with a crafted argument. Allows arbitrary code execution. (matched in decompressed stream)
  • ClamAV: Pdf.Exploit.Agent-35646 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-35646
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • unescape() call high PDF_UNESCAPE
    unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
  • 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.
  • 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.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/pdfx/1.3/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0347_000.js
07b39465638b36bde3c07ff455eb653151c7e164200c36e48bd09274fbef265e		 pdf-javascript-stream PDF /JS object 347 at offset 0x7E4D2 3693 bytes
Detection
ClamAV: Pdf.Exploit.Agent-35646
Obfuscation or payload: likely
Carved artifact contains 6 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
font_00_sfnt_off0002eff0.bin
ff666f6e30c00e41151f4fb87ce622cb3aa58cbc0d424169e92436afba616314		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2EFF0 3768 bytes

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