Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c5729e17b64cd4e…

MALICIOUS

PDF

1.8 KB Created: 2018-08-10 14:50:18 +03:00 Authoring application: iTextSharp’ 5.5.10 ©2000-2016 iText Group NV (AGPL-version)
MD5: 13cc8c748ab6beab2b942a9d04679511 SHA-1: 7bc60af7993f8bf3d595e98e87f8dd99d8e7182e SHA-256: 2c5729e17b64cd4e905ccfeabbc913ed945e17625c35ec1d6932194aae83d7c6
174 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ML classification and ClamAV, indicating malicious intent. The presence of embedded JavaScript and an embedded file suggests the document is designed to act as a dropper. The embedded artifact '10082016.iqy' and the ClamAV detection 'Win.Trojan.Marap-6655016-0' point to a secondary payload being delivered. The primary detection 'Pdf.Dropper.Agent-7207970-0' further supports its role as a dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • ClamAV: Pdf.Dropper.Agent-7207970-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7207970-0
  • 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.
  • Embedded file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
10082016.iqy
bea0276c51bd6dbccb64110a8655fd623cbb9ebf6e0105c57f62e53e209361b6		 pdf-embedded-file PDF EmbeddedFile object 1 at offset 0x85 45 bytes
Detection
ClamAV: Win.Trojan.Marap-6655016-0
Obfuscation or payload: unlikely
javascript_obj0003_001.js
cd9cce653fea95e2130763dfaab157cff9424274babb4fc50b8320a86424160f		 pdf-javascript-stream PDF /JS object 3 at offset 0x138 171 bytes

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