Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e8499d52b95dc76…

MALICIOUS

PDF

2.3 KB
MD5: d84bee69b8dc6efb25466312f0743140 SHA-1: 8939896a684803d5a8ff4fd7b63b6e0b0ae5c769 SHA-256: 9e8499d52b95dc76e387ea7ed74b3eabf3676bac0478bafe1799594348b530ea
118 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. A critical finding is the CVE-2008-2992 exploit, which utilizes a util.printf function within a JavaScript stream. This suggests the PDF is designed to exploit this vulnerability to execute arbitrary code. The presence of unescape() further points to obfuscated JavaScript intended to download and execute a secondary payload.

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
baa11e139aee412c9ea752b2fd15c2474f92c139a73de051fa0a6652acb70b73		 pdf-javascript-stream PDF /JS object 263984 at offset 0x197 6943 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 10 eval/decoder/string-building token(s). Carved artifact contains 3 long base64-like blob(s).
javascript_obj263985_001.js
01235287f9dc8911598aef3597dc852479c0e3c4fdad569ad937618107a485d3		 pdf-javascript-stream PDF /JS object 263985 at offset 0x6B6 157 bytes
javascript_obj263986_002.js
08fba12d2853da0ef24ef8e8cb8104b62084539977dee2914db81352815b1ea3		 pdf-javascript-stream PDF /JS object 263986 at offset 0x787 520 bytes

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