Malicious PDF — malware analysis report

Static analysis result for SHA-256 a77785e332617bd7…

MALICIOUS

PDF

3.2 KB
MD5: bb5952a0c2bbfbe70e75a8ef4901b8f5 SHA-1: 41378fb2a874febfe2c5809be6e923608da54149 SHA-256: a77785e332617bd7d0626ba0ce76f5acba8b4e7e93e83012fea384d98e439032
178 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: Malicious File

The PDF file contains embedded JavaScript that is obfuscated using unescape(). The critical heuristic firing for CVE-2009-4324 indicates the exploitation of a vulnerability related to media player functionality. This suggests the primary goal is to execute arbitrary code via the embedded script, likely leading to further payload delivery.

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. (matched in decompressed stream)
  • ClamAV: Pdf.Exploit.Agent-12515 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-12515
  • 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
93bfdd00ded1f47a3c803edfa57dffd8e47a4c3d798510ea846731e97f233fa2
pdf-javascript-stream PDF /JS object 6 at offset 0x19D 2184 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 3 eval/decoder/string-building token(s).