Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3ccb2163be9c535…

MALICIOUS

PDF

8.1 KB
MD5: 0f426bdd100c311b4ee6c39912c90b01 SHA-1: 766f130a0704e9d9d589541d5c11e9085334e066 SHA-256: d3ccb2163be9c535bd4d7ddc6f26769349c8534f2ad439bf342e40f9f6e86d33
64 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, PDF_EVAL, and PDF_FROMCHARCODE. The presence of an eval() call and String.fromCharCode suggests the script is obfuscated and likely attempts to execute arbitrary code. This is a common technique for downloading and running a second-stage payload. No specific malware family could be confidently identified.

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. (matched inside decoded stream)
  • 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. (matched inside decoded stream)
  • 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)
  • 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/xap/1.0/
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/pdf/1.3/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00000489.bin
8505f10ea09728a0b8061e075f08305459e5e3c53453a51cfcdb1922310e1722		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x489 2438 bytes
objstm_0025_00.bin
ce05cdfbe9d28f50ee127f1704653c93d30824c9a5bea87ee667494fcc298a22		 pdf-objstm-decoded PDF /ObjStm 25 0 obj (inflated) 471 bytes

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