Malicious PDF — malware analysis report

Static analysis result for SHA-256 305af7b832b61e7a…

MALICIOUS

PDF

6.9 KB
MD5: 4a43a93df57489e9ec8c32e3e5b1cbfc SHA-1: 1df32d2ebbbbcdd214d9bde52ab7c639aea4625a SHA-256: 305af7b832b61e7abb7964772230bf725ac95b48a8a242991bdd68f3b7ff6859
136 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript that utilizes the 'unescape()' function and targets the 'Collab.getIcon' method, indicating exploitation of CVE-2009-0927. The JavaScript is obfuscated and likely intended to download and execute a second-stage payload. No specific malware family could be identified.

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)
  • Suspicious extracted artifact medium 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. (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)
  • 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
db40a1d4acae9c9794c849e9444a0337c87128e88a142fca5e105162906022f3		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x327 1637 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s).
objstm_0024_00.bin
a40bda0ceda606d367e187d18a3dca7fb34bfde2d0b62945320b7cb6dd9f72b4		 pdf-objstm-decoded PDF /ObjStm 24 0 obj (inflated) 331 bytes

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