Malicious PDF — malware analysis report

Static analysis result for SHA-256 83fe443b3088d1d0…

MALICIOUS

PDF

1.4 KB
MD5: 9d72b10753536d3d2b9c155b91a77a44 SHA-1: 4b9de11306a4a93e32abe5bf5ffc7af891753209 SHA-256: 83fe443b3088d1d00d9dac79a3e67f13f4fa0e84a058478bf9c5ee00c244c451
178 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: Malicious File T1071.001 Web Protocols: Web Protocols

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. A critical heuristic identifies the CVE-2009-4324 vulnerability related to media player execution. The ClamAV detection as Pdf.Dropper.Agent-7278233-0 further confirms its malicious nature. The embedded JavaScript is likely responsible for downloading and executing a secondary payload, a common dropper behavior.

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.Dropper.Agent-7278233-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7278233-0
  • 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 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
39b41e666e27b30c728b1482dfc80534e000e8257515271602cfdc2aedefacb5		 pdf-javascript-stream PDF /JS object 111712 at offset 0x2B2 978 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 0x515 70 bytes

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