Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0fadc41c443010a…

MALICIOUS

PDF

27.7 KB
MD5: 64c45c6a38d942d1a4890ca00748936f SHA-1: abe711ab6f3468cd699593885ada22e5e5ea64d1 SHA-256: e0fadc41c443010a1f1df269d7b41036a99a47852cb6eed1cd1a2152810f756f
136 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. ClamAV detections (Win.Trojan.Agent-36100) on both the original file and an extracted artifact confirm its malicious nature. The embedded JavaScript is likely responsible for downloading and executing a secondary payload, contributing to the overall malicious behavior of the document.

Heuristics 4

  • ClamAV: Win.Trojan.Agent-36100 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Trojan.Agent-36100
  • 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.
  • 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.

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0008_000.js
8da73b6f4e48a86f34131c0a80cda47e227cd57ea65dc9298433962b07712f92		 pdf-javascript-stream PDF /JS object 8 at offset 0x1E7 27621 bytes
Detection
ClamAV: Win.Trojan.Agent-36100
Obfuscation or payload: unlikely
legacy_pdfkit_stage_000.js
a8f3843a873c4150ca0a92ac5b8934f6eb3286e424d4d4faae9030061cf7775d		 deobfuscated-js double percent-decoded annotation JavaScript at offset 0x1E7 15189 bytes

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