Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e1ed5c509af659a…

MALICIOUS

PDF

1.4 KB
MD5: ada5e3178b12f72edd0d6825f0f74b61 SHA-1: 7d6e9e7b88fa2338fe74dd75f670a4b27ed15c90 SHA-256: 3e1ed5c509af659a4ffb02dee17bb3d0fba9dafba4372826031155e3cab69a4e
118 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript, which is further obfuscated and uses an unescape() call. A critical heuristic identified the CVE-2009-4324 vulnerability related to media.newPlayer, indicating the exploit's target. 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 5

  • 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)
  • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj111711_000.js
ed214d008ca7f8fad0affc792159f2b30ce479dc90c5348e0751937c74ebe0c2
pdf-javascript-stream PDF /JS object 111711 at offset 0x197 291 bytes
javascript_obj111712_001.js
c7bd1b19ef062bb4976e678374af001fd45629bde32d46070d129f7052099835
pdf-javascript-stream PDF /JS object 111712 at offset 0x2B2 984 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 2 eval/decoder/string-building token(s).
javascript_obj111713_002.js
d2f98bec78aa096efa5aca99b701d5e6b9a8e2cf728fb7e79bf248862bacf14b
pdf-javascript-stream PDF /JS object 111713 at offset 0x51B 70 bytes