Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b9e53bf61f2c2a7…

MALICIOUS

PDF

5.8 KB
MD5: 7ebd8f33d41443440d1c6fbf20e0d7b7 SHA-1: f6976732b98fd97aea599eea9acbaae0cefdfd46 SHA-256: 7b9e53bf61f2c2a73ebce34d6541d228a6420d0b1ea29a0806453a15cedc3185
178 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File

The PDF file contains embedded JavaScript and triggers a critical vulnerability (CVE-2008-2992) related to util.printf. This indicates the document is designed to exploit this vulnerability to execute arbitrary code. The presence of obfuscated JavaScript and a ClamAV detection for 'Heuristics.PDF.ObfuscatedNameObject' further supports a malicious intent, likely to download and execute a secondary payload.

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)
  • ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
  • 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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0006_000.js
15d0591b8aaafb5e63854cbd4aa7dde7deb0b28ba16e71b24837513a1c82ae25
pdf-javascript-stream PDF /JS object 6 at offset 0x18F 5063 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).