Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb3d2bd8be888f93…

MALICIOUS

PDF

1.8 KB
MD5: 192c778f488d686e8981d29af176b697 SHA-1: d99ce865069dd1998f1edb686827270b26873dd2 SHA-256: bb3d2bd8be888f93c9c4bc4cde1f46c0a9a90beeec2f5c86548343beded3b658
164 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 JavaScript/Shell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. The critical heuristic CVE_2008_2992 specifically points to the exploitation of CVE-2008-2992 via util.printf. This suggests the file is designed to deliver a malicious payload by exploiting this known PDF vulnerability. No specific malware family could be identified.

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