Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dbb5cf05dfdbed5…

MALICIOUS

PDF

6.4 KB
MD5: 7d7186f6aae04fbae18603132c6865ad SHA-1: d68926eaffba788a0910a6714036aa549f5a9814 SHA-256: 2dbb5cf05dfdbed58f9fd45ed41c2e67202e9aaea15c7f2c121e93ee3a1bb0ed
178 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript, indicated by PDF_JAVASCRIPT and PDF_JS heuristics. The critical CLAMAV_DETECTION and EXTRACTED_FILE_CLAMAV heuristics identify the embedded JavaScript as Js.Exploit.Shellcode-18. The PDF_UNESCAPE heuristic suggests the JavaScript is obfuscated. The primary function of this script appears to be downloading and executing a malicious payload, as evidenced by the ClamAV detection name. No benign URLs were found, and the document body contained only garbled data, providing no further context.

Heuristics 7

  • ClamAV: Js.Exploit.Shellcode-18 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Js.Exploit.Shellcode-18
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • 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.
  • 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/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0003_000.js
d8d2fc3f5a82a3094ffc37ae0a3bed1a1f39aaa3e42b3ff3b22fc1a70e8ca221		 pdf-javascript-stream PDF /JS object 3 at offset 0x1052 7663 bytes
Detection
ClamAV: Js.Exploit.Shellcode-18
Obfuscation or payload: likely
Carved artifact contains 9 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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