Malicious PDF — malware analysis report

Static analysis result for SHA-256 2194a62738f70279…

MALICIOUS

PDF

1.8 KB
MD5: 0635ba88543f3d82aefd673134ae88b2 SHA-1: d87488d0e2aa546b8ee560cebe6b62ed2a29ba23 SHA-256: 2194a62738f70279c1b035e0437177c27476a80c52668af653ff594966f1164e
164 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript, which is triggered by the util.printf function, indicating exploitation of CVE-2008-2992. The JavaScript is likely designed to download and execute a second-stage payload. ClamAV also detected this file as Pdf.Exploit.Agent-36183.

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.Exploit.Agent-36183 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36183
  • ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX
    Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
  • 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.
  • ASCII85Decode filter (with exploit indicators) low PDF_FILTER_85
    ASCII85 encoding filter present alongside exploit delivery indicators — uncommon outside of obfuscation

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0006_000.js
f86b1e5220183f7c7e3ea8cddca0c8beed42f4aca8952f8c95b07b9823f2ed6e
pdf-javascript-stream PDF /JS object 6 at offset 0x138 1345 bytes