Malicious PDF — malware analysis report

Static analysis result for SHA-256 4799ebf28a41a025…

MALICIOUS

PDF

27.6 KB
MD5: 6b5a925305a0bd3f209501855005fe26 SHA-1: f34b2c1252057f4e6800155199d09cf5f3485076 SHA-256: 4799ebf28a41a025aa9b4a82e0afaa70465f6e017407bd6625cd6efde1640c29
136 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings. ClamAV detections for 'Win.Trojan.Agent-36100' on both the original file and an extracted artifact strongly suggest malicious intent. The embedded JavaScript is likely responsible for exploiting a vulnerability within the PDF reader to execute malicious code, leading to the detected malware.

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
726f39fbdf2b154d067de805f1a54125b996df22ab7671f870217568967d7d8e		 pdf-javascript-stream PDF /JS object 8 at offset 0x1E7 27477 bytes
Detection
ClamAV: Win.Trojan.Agent-36100
Obfuscation or payload: unlikely
legacy_pdfkit_stage_000.js
3962dd0441e304ebf0a3825789c1b4ec1015ef56f5309fb6f2604b617cd1ce18		 deobfuscated-js double percent-decoded annotation JavaScript at offset 0x1E7 15117 bytes

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