Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7ad88687688192b…

MALICIOUS

PDF

7.4 KB Created: 2009-12-17 16:59:10 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)
MD5: 1200fdd4a5ed04e18f0b8c9969fa2246 SHA-1: ce0ac8d1bc0d3a62287a135700f1ffb195bf5324 SHA-256: c7ad88687688192bda54ad284c71230f5fcc87d6cff761f8e05c1b584e8d614b
98 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1059.007 JavaScript

The PDF file contains embedded JavaScript that utilizes eval() and unescape() functions, indicating obfuscation. The heuristic firings suggest the JavaScript is designed to execute malicious code, likely downloading and running a second-stage payload. The presence of a JavaScript stream and the use of eval/unescape point towards an exploit delivery mechanism. The specific JavaScript file 'javascript_obj0021_000.js' is identified as a suspicious artifact.

Heuristics 5

  • eval() call high PDF_EVAL
    eval() found — commonly used for obfuscated exploit execution (matched inside decoded 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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0021_000.js
18d361ec41a111d98bad4d7abc529a05d91818cd5299c6d98b739da968919add
pdf-javascript-stream PDF /JS object 21 at offset 0x1883 865 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 2 eval/decoder/string-building token(s).