Malicious PDF — malware analysis report

Static analysis result for SHA-256 420342e38f4b1af5…

MALICIOUS

PDF

12.6 KB
MD5: 87f7c96894cb0adb6ad5088caa3c2e66 SHA-1: 6e450bedbf44ea72ee2eec6a2b43aa8582fc4cb4 SHA-256: 420342e38f4b1af5e4231ff809ec5c0b03c367e3e8d2399cd838a41d55129a05
116 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript, flagged by multiple heuristics as a stager and exploit. ClamAV detection 'Pdf.Exploit.Dropped-94' further confirms its malicious nature. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload, although the exact mechanism is obfuscated. The PDF metadata also contains JavaScript, indicating a multi-stage attack.

Heuristics 4

  • ClamAV: Pdf.Exploit.Dropped-94 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Dropped-94
  • PDF metadata JavaScript eval stager high PDF_METADATA_EVAL_STAGER
    PDF JavaScript reads document metadata fields such as title, subject, or producer, decodes character data with parseInt/String.fromCharCode style helpers, and evals the recovered stage. This is a high-signal exploit-kit staging pattern.
  • 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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0076_000.js
6e813687920847f9c2c05b694763d58be8c56f0baf4b64564be54bf09dd4f4f9
pdf-javascript-stream PDF /JS object 76 at offset 0x3059 331 bytes