Malicious PDF — malware analysis report

Static analysis result for SHA-256 46efec24d25f053f…

MALICIOUS

PDF

6.1 KB
MD5: 29ca22d95d637d87f2384a06568e9ddf SHA-1: 30452643c4021139d06909b1d5a2e791eea705b0 SHA-256: 46efec24d25f053febb42e371b01e2cc5c0dc100b53f62df066ce5ccd9470885
180 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript and triggers a critical vulnerability (CVE-2008-2992) related to `util.printf`. This indicates the file is designed to exploit this flaw to execute arbitrary code. The presence of a JavaScript stream and the ClamAV detection as 'Pdf.Dropper.Agent' strongly suggest it acts as a dropper for further malicious activity. The extracted JavaScript object, though not fully detailed here, is a key component in this execution chain.

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-7256662-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7256662-0
  • 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_obj0006_000.js
fbc7a38dcb9488732a4c23c1125eece4abef0021c9828c2f0dafcbae7e8d2f07		 pdf-javascript-stream PDF /JS object 6 at offset 0x18B 5263 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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