Malicious PDF — malware analysis report

Static analysis result for SHA-256 edf1895c69adec92…

MALICIOUS

PDF

27.7 KB
MD5: bbcc7234add7dfd08bd0197eee6b2f00 SHA-1: f0ab6dc311e89e4a2a9386d88d7bc460a95554dd SHA-256: edf1895c69adec9224b3c2e0583ac96589f729906fc992e6c317ab634ca351ef
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 confirm the file is malicious, identifying it as Win.Trojan.Agent-36100. The embedded JavaScript is likely responsible for exploiting vulnerabilities within the PDF reader or delivering a secondary payload, contributing to the overall malicious intent 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
59ccb1f3fe1a610c6345fd6829c2fe4ca016e3e76864a1e78fd89f5875748a23		 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
fb324124331800fee429b328e63de39b214b3e0d3baa10f911fde10702b3604b		 deobfuscated-js double percent-decoded annotation JavaScript at offset 0x1E7 15189 bytes

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