Malicious PDF — malware analysis report

Static analysis result for SHA-256 351951e7d2615db5…

MALICIOUS

PDF

97.6 KB
MD5: bc9493fdf5584051c70d65211fcac07a SHA-1: eecbd79062657405869f29b7a2180f70ddb08edf SHA-256: 351951e7d2615db5f51de3af532238161313f7227595be453f284bb3e524c1f6
120 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.001 Malicious Link T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF file contains embedded JavaScript that utilizes the unescape function and targets CVE-2009-0927 (Collab.getIcon). This indicates an attempt to exploit a known vulnerability to execute arbitrary code. The script likely downloads a second-stage payload from the external URI http://news.bbc.co.uk/2/hi/americas/8019832.stm, although this URL is confirmed benign and may be a decoy or part of a multi-stage attack. The primary attack vector is the exploitation of the CVE-2009-0927 vulnerability.

Heuristics 7

  • 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.
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://ns.adobe.com/pdf/1.3/
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/pdfx/1.3/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0213_000.js
1f11699ffe8bff2116c5404b4b4b296ee5b5242ed38c8d53a1d788b153b3d7b7		 pdf-javascript-stream PDF /JS object 213 at offset 0x106A6 5998 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 4 eval/decoder/string-building token(s).
objstm_0184_00.bin
d3034d95422f26053e1eae96db7a2ad0b6b0a9c851171bc07978b047dba4cf6b		 pdf-objstm-decoded PDF /ObjStm 184 0 obj (inflated) 2520 bytes
objstm_0020_00.bin
523917170dd32deb7e3bdafef79ec9ec1266b2869fa2f48ca5abe733dcb7fa88		 pdf-objstm-decoded PDF /ObjStm 20 0 obj (inflated) 1431 bytes

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