Malicious PDF — malware analysis report

Static analysis result for SHA-256 b47f49c1862c1f53…

MALICIOUS

PDF

4.1 KB Created: 2008-31-20 53:85:00 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)
MD5: 1d6b3e49bd401c9177bb63afc62b4e71 SHA-1: 677792c5b8239928eea451da433b00c776c98785 SHA-256: b47f49c1862c1f53497ca20b93a257c064e554a9079b827963cc2383f7144772
66 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The presence of an eval() call and String.fromCharCode within the decoded stream suggests obfuscated JavaScript is being used to dynamically construct and execute code. This pattern is commonly used to download and execute further malicious payloads. The extracted artifact 'javascript_obj0013_001.js' further supports the presence of script-based malicious activity.

Heuristics 5

  • eval() call high PDF_EVAL
    eval() found — commonly used for obfuscated exploit execution (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.
  • String.fromCharCode low PDF_FROMCHARCODE
    String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules. (matched inside decoded stream)
  • 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_obj0013_001.js
7b10a9f0c76229c51bf977d0d1ef2931db63c28514e4914d843525c86c1e5beb
pdf-javascript-stream PDF /JS object 13 at offset 0x3D2 12698 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 3 eval/decoder/string-building token(s).