Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f61ef484b87bb06…

MALICIOUS

PDF

1.6 KB
MD5: 1958e34f61651e351749fb19ffcddd8f SHA-1: 90c2bf5e85a63f3ea11ce3794b0c0d196a95da30 SHA-256: 4f61ef484b87bb06da0e934b2c114b2b902cc1d77e6672c8b486b045812c1d16
178 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The critical CVE_2008_2992 heuristic firing suggests exploitation of a vulnerability related to util.printf, commonly used in older PDF exploits. The embedded JavaScript stream, identified as javascript_obj111111_000.js, likely contains obfuscated code designed to download and execute a secondary payload. ClamAV also detected this file as Pdf.Dropper.Agent-7212488-0, reinforcing its malicious nature as a dropper.

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: Pdf.Dropper.Agent-7212488-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7212488-0
  • 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_obj111111_000.js
c74dffe32300d3be0f491bc2b2b33a476955df8ca08b21d733858a333301447e		 pdf-javascript-stream PDF /JS object 111111 at offset 0x160 2473 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 4 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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