Malicious PDF — malware analysis report

Static analysis result for SHA-256 96534e8307ab706e…

MALICIOUS

PDF

2.3 KB
MD5: 6bbe8f0e47ec571a10ee452bf5781cc1 SHA-1: 0c6cfaf65bc2f529c6c26958f6b2fa68723d0afe SHA-256: 96534e8307ab706e91328a64459c59f068b30f47b62c33816f264ac51ce2a7f1
118 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File T1071.001 Web Protocols

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. The critical CVE_2008_2992 firing suggests exploitation of a known PDF vulnerability. The embedded JavaScript, particularly the unescaped content, is likely designed to download and execute a secondary payload. The presence of multiple JavaScript streams and a suspicious extracted file named 'javascript_obj263984_000.js' further supports this. The document body is unreadable, but the technical indicators point to a malicious exploit delivery.

Heuristics 5

  • 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.
  • 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.

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj263984_000.js
eea76abc6f5b165a3d6f63045206ba7e2e45bf38c9b50681864764c5b77f7367		 pdf-javascript-stream PDF /JS object 263984 at offset 0x197 7000 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 11 eval/decoder/string-building token(s). Carved artifact contains 3 long base64-like blob(s).
javascript_obj263985_001.js
06e545bf2b13197dff80c126f11fb65eaaa8dcd367b561ba25c51dcba4b0a72a		 pdf-javascript-stream PDF /JS object 263985 at offset 0x6B4 152 bytes
javascript_obj263986_002.js
086bf2465ad40701629984b18a67bb8bc3f9c3f78aae45ba5b5cf7034c93b39d		 pdf-javascript-stream PDF /JS object 263986 at offset 0x783 508 bytes

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