Malicious PDF — malware analysis report

Static analysis result for SHA-256 decdc5f0769121b3…

MALICIOUS

PDF

4.1 KB Created: 2008-07-26 19:43:58 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)
MD5: 460109886c201ad4d96a73b57a40478e SHA-1: 83762591c3baf144139ad2836483f51622d48cdf SHA-256: decdc5f0769121b3852014af0be1e844cb6e266c0aebc082e469f50a27143954
98 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The presence of PDF_EVAL and PDF_UNESCAPE suggests the JavaScript is obfuscated and likely malicious. The extracted artifact 'javascript_obj0014_000.js' is a strong indicator of malicious JavaScript execution. The overall pattern points to a PDF-based exploit attempting to download and execute further malicious content.

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_obj0014_000.js
7d2d9aef922c8e8e435779e26118247bf6fbabf7c7ce27a61ad8d9a66f5adf4c
pdf-javascript-stream PDF /JS object 14 at offset 0x368 33646 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).