Malicious PDF — malware analysis report

Static analysis result for SHA-256 89d25eaaede09f20…

MALICIOUS

PDF

237.5 KB Created: 2010-03-10 15:47:59 UTC Authoring application: PScript5.dll Version 5.2.2 (via Acrobat Distiller 5.0.5 (Windows))
MD5: da5f4cb42adaecfcbfc0b50ec49d16f1 SHA-1: 5983245daa6dfdeafffdfc56adb2df11579c8824 SHA-256: 89d25eaaede09f20e2ed3b1c677f5de6e82f1127effee22dca1b335a7cc98ff0
66 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The eval() call and String.fromCharCode usage suggest obfuscated JavaScript code is present. An extracted file named 'javascript_obj0026_000.js' was flagged as suspicious. While no specific URLs were confirmed malicious, the presence of obfuscated JavaScript strongly suggests the intent to download and execute a secondary payload.

Machine Learning

  • Nyx PDF Classifier clean score 0.1500

Heuristics 6

  • 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.
  • 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.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/iX/1.0/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://purl.org/dc/elements/1.1/

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0026_000.js
e412e375ae147d5f6c949022f0ff454661c0f9dfb4b093ac1cfec98c24475308		 pdf-javascript-stream PDF /JS object 26 at offset 0xBA6 5031 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 10 eval/decoder/string-building token(s).
stream_015_off0001b281.bin
b7a4cef5af17f1b9773b5164b4877128f356259f62aa2ff83c554a9b55f97b22		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1B281 39984 bytes
stream_046_off00028199.bin
f8b5634482dabaf0040161953b708d7648a1dc1459beb6e63bf997bafb4818f7		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x28199 107773 bytes
icc_00_off0000b276.icc
2b3aa1645779a9e634744faf9b01e9102b0c9b88fd6deced7934df86b949af7e		 pdf-icc-profile PDF ICC profile at offset 0xB276 3144 bytes
font_01_sfnt_off00037701.bin
659bf0b8035208f1758f1b892614dbfb0b5b7baad6052234297b54474b1d2dba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x37701 27605 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.