Malicious PDF — malware analysis report

Static analysis result for SHA-256 4076f2ffdb716ed3…

MALICIOUS

PDF

6.3 KB
MD5: fad1d567aafd8ff9c7da8d387ff30e80 SHA-1: f4fc25b973878b3c45ac57ff0c46cb9013326f6e SHA-256: 4076f2ffdb716ed36c3fe709aa5b576a93a1ead73bd5758c41272a602d748393
178 Risk Score

Malware Insights

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

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 ClamAV detection as Pdf.Dropper.Agent-7253828-0 further confirms its malicious nature. The embedded JavaScript, identified as javascript_obj0006_000.js, likely serves to download and execute a secondary payload, a common dropper behavior.

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-7253828-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7253828-0
  • 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
45d3956f05647b41d866a07cda476b7fc0d85197855943de641ec388099a0c92		 pdf-javascript-stream PDF /JS object 6 at offset 0x19B 5363 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 2 long base64-like blob(s).

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