Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3265cf30acdb709…

MALICIOUS

PDF

7.0 KB
MD5: ec622f05a71405cfcdc6a1f0111d8c52 SHA-1: 3c6f5b502368305c7e0479616ab4e76df00fa686 SHA-256: e3265cf30acdb709f87e9731240707a4c47868251cf29faab65d2ea44cd9ef6a
118 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript that utilizes the 'unescape()' function and targets the 'Collab.getIcon' method, indicating exploitation of CVE-2009-0927. This vulnerability allows for arbitrary code execution within the context of Adobe Reader. No specific malware family was identified, but the exploit is designed to deliver a malicious payload.

Heuristics 6

  • 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)
  • 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. (matched inside decoded stream)
  • 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. (matched inside decoded stream)
  • 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/xap/1.0/
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/pdf/1.3/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00000327.js
cb03b9521787c401c91b14da8d2fc4a7e43e681b242d5e5d08eedf2f92eb9681		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x327 2274 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).
objstm_0024_00.bin
f1d318325b0d73d912ed4277b1032b47a50e7b5947e0671953e0373404b3af93		 pdf-objstm-decoded PDF /ObjStm 24 0 obj (inflated) 331 bytes

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