Malicious PDF — malware analysis report

Static analysis result for SHA-256 a00350cfe5be0061…

MALICIOUS

PDF

118.9 KB Created: 2008-02-14 17:33:19 -03:00 Authoring application: Acrobat Editor 8.0 (via Adobe Acrobat 8.1.0)
MD5: 0b14253d1d871ddd25953f5697ebe1d0 SHA-1: a11d8a6ae6ef178d75ec92b3c878a8f9a5277b7a SHA-256: a00350cfe5be00611f6e1e3cf500ce7a37183dd9a94f81d80fd73a8d46d3402b
118 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript and triggers a critical heuristic for CVE-2009-0927, indicating exploitation of a known vulnerability in Adobe Reader. The unescape() function and the presence of a decompressed stream suggest code execution. While no specific URLs were found to be malicious, the exploit itself is the primary indicator of malicious intent, likely to download and execute a secondary 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.
  • 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/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/
    • http://ns.adobe.com/iX/1.0/

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00002125.bin
083f874e51effbc19b93796961fc2c24115e07930f40a94eb7811e57df86bc01		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2125 4096 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
stream_009_off000185f4.bin
834193085155a326f4c778f13bd3bbeb0a720c226771796767f5c5bba8aec67e		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x185F4 38008 bytes
icc_00_off00013ba7.icc
2b3aa1645779a9e634744faf9b01e9102b0c9b88fd6deced7934df86b949af7e		 pdf-icc-profile PDF ICC profile at offset 0x13BA7 3144 bytes
font_00_sfnt_off00014f26.bin
2aae4b860d2253206eee2a74f94f4b697cbe09fb82814b6ace1977a5097b683e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14F26 30792 bytes

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