Malicious PDF — malware analysis report

Static analysis result for SHA-256 50514827b767271b…

MALICIOUS

PDF

6.3 KB
MD5: 072847f508319729303cfc5c1dbb6f33 SHA-1: 4fb380345a71873c1a87a7c161a4ff07fce694d3 SHA-256: 50514827b767271b7cac5017423706e49294bd7abd5f36c5c83d8259496c5b6f
66 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment T1071.001 Web Protocols

The PDF file contains embedded JavaScript, flagged by multiple heuristics, which is designed to obfuscate and execute malicious code. The ML classifier strongly indicates maliciousness. The embedded JavaScript likely attempts to download and execute a second-stage payload from the provided URL. The document body contains obfuscated strings that appear to be part of the JavaScript's deobfuscation routine.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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://www1.strongthantivir.it.cx/?1cks=VcbY17DZ6tSU3N3MnqOsmaaP5qXPqKak1qefosytmpOjmt3ppqNklqOoqKSnoaaN4Nuen6SZro%2FTk8XdsMXIvZXe0NillJTnjQ%3D%3D

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0005_000.js
9a225ab1291ecad0bf6ff71f2d0bd467c2beac167219b2123086f2a735a0382b		 pdf-javascript-stream PDF /JS object 5 at offset 0x1A6 5738 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s). Carved artifact contains 1 long hex-escaped blob(s).

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