Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7b58dc676779bd5…

MALICIOUS

PDF

1.4 KB
MD5: f0e7f87be5fcc28f525356421848c428 SHA-1: 7e6e873e587b59818e5abe16f376c10f97548fe4 SHA-256: d7b58dc676779bd5045cac877fd14fbaba4756e4ec64c490ca371feecc24d3b0
180 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. A critical heuristic identified the CVE-2009-4324 vulnerability related to media.newPlayer, suggesting the JavaScript is used to exploit this flaw. The presence of obfuscated JavaScript further supports the malicious intent. The primary goal appears to be the execution of this script, which likely leads to the download and execution of additional malware.

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-14126 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-14126
  • 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
e5fcd91426a580c766cf31277c3544a7653317011838d78907f519f62209f098		 pdf-javascript-stream PDF /JS object 111712 at offset 0x2B2 936 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 0x501 70 bytes

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