Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad918c6b9a2851f6…

MALICIOUS

PDF

6.0 KB
MD5: faabbe02ba1af370f31b231d8daae8c4 SHA-1: f46549897fcc911ba552e1738ccdba121383e5ca SHA-256: ad918c6b9a2851f62c97f3e7e42cc8fa54820b5cfad699f7525f4c86dd48ae99
178 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript, which is obfuscated and utilizes the unescape() function. A critical heuristic firing indicates exploitation of CVE-2008-2992 via a util.printf call within the JavaScript. This suggests the script is designed to download and execute a second-stage payload. The ClamAV detection further supports the malicious nature of the file.

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
27a8276719fe072bac45d63e7383d97aebe3e1bd2ee30d50e82e6189cd8bb445		 pdf-javascript-stream PDF /JS object 6 at offset 0x1A9 4990 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 3 eval/decoder/string-building token(s).

Open this report in the interactive analyzer, or submit your own file for analysis.