Malicious PDF — malware analysis report

Static analysis result for SHA-256 92550e88c3b1dc8d…

MALICIOUS

PDF

1.25 MB Created: 2010-07-28 12:28:14 Authoring application: Scribus 1.3.3.14 (via Scribus PDF Library 1.3.3.14)
MD5: 0d86b469d1b9270c3e20a77245a15c8e SHA-1: 73c7622307a4302dee00893d6388e8e811ccedb5 SHA-256: 92550e88c3b1dc8d225bb1b814ec1c327de88751b4a57b6dda34e5c64b5f5544
76 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF contains embedded JavaScript, which is further obfuscated and uses an eval() call, indicating an attempt to execute arbitrary code. The heuristic 'Suspicious extracted artifact' flags hex escape obfuscation and script obfuscation indicators within the extracted javascript_obj0055_001.js file. This suggests the script's purpose is to download and execute a second-stage payload. The confidence is moderate due to the lack of specific IOCs beyond the filename of the embedded script and the obfuscated nature of the JavaScript.

Heuristics 5

  • eval() call high PDF_EVAL
    eval() found — commonly used for obfuscated exploit execution
  • Suspicious extracted artifact medium 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.
  • 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.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.monotype.comMonotype
    • http://www.monotype.com/html/mtname/ms_timesnewroman.htmlhttp://www.monotype.com/html/mtname/ms_welcome.htmlhttp://www.monotype.com/html/type/license.html
    • https://www.verisign.com/rpa
    • http://ocsp.verisign.com/ocsp/status0
    • https://www.verisign.com/rpa0
    • http://crl.microsoft.com/pki/crl/products/CodeSignPCA.crl0
    • http://www.microsoft.com/typography

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0055_001.js
c397b7957d26d3390f5ce6fff7081e203ffe681c6d8be156c0bf576a2f214abe		 pdf-javascript-stream PDF /JS object 55 at offset 0x13DBAE 6791 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 1 long hex-escaped blob(s).

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