Malicious PDF / .IN_ — malware analysis report

Static analysis result for SHA-256 de5e214ab2173045…

MALICIOUS

PDF / .IN_

3.7 KB
MD5: 8500a755b21fd5a98ac6fe0bae71f828 SHA-1: 38a9f7c092e86597c6a47eb2aace2e889d99098d SHA-256: de5e214ab21730458df0153d1fc1917b34ca7e5bece3938bccac64e915af645f
158 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.001 Malicious Link T1059.007 JavaScript

The PDF file contains embedded JavaScript that utilizes eval() and unescape() functions, indicating obfuscated code execution. A critical heuristic firing for CVE_2009_4324 (media.newPlayer) suggests exploitation of a known Adobe Reader vulnerability. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload, as suggested by the heuristic 'Suspicious extracted artifact — Signals: Script obfuscation indicators'.

Heuristics 6

  • media.newPlayer — CVE-2009-4324 critical CVE exact CVE_2009_4324
    PDF JavaScript calls media.newPlayer — CVE-2009-4324 is a use-after-free in Adobe Reader's multimedia plugin triggered by media.newPlayer(). Actively exploited as a zero-day in December 2009.
  • eval() call high PDF_EVAL
    eval() found — commonly used for obfuscated exploit execution
  • unescape() call high PDF_UNESCAPE
    unescape() found — often used to decode shellcode in PDF JS exploits
  • 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_obj0008_000.js
abce12225956be0a05e966d645e465a9faed25f4529891d5312093ae05ac9ebb		 pdf-javascript-stream PDF /JS object 8 at offset 0x217 533 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s).

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