Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0f7b25344de55b5…

MALICIOUS

PDF

6.7 KB
MD5: bb01a7871239792324c779eb82cd4a27 SHA-1: bc58a52167088dab1651101108b4f11a6e851692 SHA-256: f0f7b25344de55b5857659f1b2e0d671ff2a61aff0933efa28bba69cfed1f950
66 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file contains embedded JavaScript, flagged by multiple heuristics, which is highly indicative of malicious intent. The ML classifier strongly supports this assessment. The JavaScript appears to be obfuscated, but its presence and the embedded URL suggest it is designed to download and execute a second-stage payload. The extracted URL is the primary indicator for further investigation.

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.stronglfoantivir.uni.me/?jnehpjrlwj=jtHSzK3P6tGd39zYr6Sll6SM49XasZ6ny6eeoZuho6CpkuvdsKWlop6Zn5yklZ%2Ba1emmpJ2fi8nSzOSpyb6%2BmuLY0qSfjOKF

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0005_000.js
d43a52726e5fce1f0ff8a90cd0c0713cedf2247249df914882cbb7c5fdbb7263		 pdf-javascript-stream PDF /JS object 5 at offset 0x1D4 6079 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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