Malicious PDF / .SWA — malware analysis report

Static analysis result for SHA-256 a4901a3156758790…

MALICIOUS

PDF / .SWA

7.0 KB Authoring application: Sigevepipawobo (via 38e52Gijixematwa)
MD5: 206a9dc496bde41bdb345b6b4ac9816f SHA-1: 81b8dab4270f77458d39e29cb0d4c61146cad083 SHA-256: a4901a315675879078ae1a601163323ba0f2fef786f36de31920feaa5b950cd3
78 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment T1027 Obfuscated Files or Information

The PDF file was flagged by ClamAV for obfuscated JavaScript, indicating malicious intent. The embedded JavaScript stream, named 'javascript_obj0011_000.js', is the primary indicator of malicious activity. This script is likely responsible for downloading and executing a second-stage payload, a common technique for initial access and further infection. The obfuscation suggests an attempt to evade detection.

Heuristics 4

  • ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
  • 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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0011_000.js
44c0a61c015c116fd54a3a57268544777c1723396bff6033f97af518a9b12a94
pdf-javascript-stream PDF /JS object 11 at offset 0x141A 1772 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s).