Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d372239baadeaa0…

MALICIOUS

PDF

7.2 KB
MD5: e0f9a8dbb236aadc144455c0788c4cbe SHA-1: 0371b25c1b0c7c9f1e4eaf1c6f3a2746b7eb2992 SHA-256: 7d372239baadeaa07af223367ff9948b767672818675012896faa2c8ea50f59d
118 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript that utilizes the `unescape()` function and targets CVE-2008-2992, indicating an attempt to exploit a vulnerability in Adobe Reader. The script is designed to execute arbitrary code, likely to download and run a second-stage payload. No specific malware family was identified.

Heuristics 6

  • util.printf — CVE-2008-2992 critical CVE exact CVE_2008_2992
    PDF JavaScript calls util.printf() — CVE-2008-2992 is a stack buffer overflow in Adobe Reader triggered by a long format-specifier argument. Widely exploited in the wild after disclosure. (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.bin
c58f059639990219d29bcca0235e098d8d7c5eb51aea043e410beec973c10630		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x327 4168 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 9 eval/decoder/string-building token(s). Carved artifact contains 3 long base64-like blob(s).
stream_003_off0000087d.js
f0d63e30ba911bd07e97d94951dc317dba2b3dab13705c27b7b47c5a8d821ead		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x87D 603 bytes

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