Malicious PDF — malware analysis report

Static analysis result for SHA-256 55fbc5b5c5f6f21a…

MALICIOUS

PDF

7.4 KB Created: 2010-09-16 18:55:19 Authoring application: Tolhipezorojpagiwaqo (via f4f35Seueganadazaqeav)
MD5: 6fdd0d94ca18b8a34f773cec83010eb3 SHA-1: 9d9e8c119cb2a7cf575e72e08ca721244cc1968f SHA-256: 55fbc5b5c5f6f21a54bc7b88e8aaa87061f1282cc6012620e2d44a61f8c267ce
76 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.002 Spearphishing Attachment

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including 'PDF_JAVASCRIPT' and 'PDF_JS'. The ClamAV detection 'Heuristics.PDF.ObfuscatedNameObject' further suggests malicious intent. The JavaScript is likely used to exploit a vulnerability within the PDF reader, leading to the execution of arbitrary code. The obfuscated nature of the JavaScript and the PDF structure points towards a downloader or exploit delivery mechanism.

Heuristics 3

  • 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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0011_000.js
e2d41866c9fb013feb60cefe8b41892c7277decb0774febb940ce493b1221654		 pdf-javascript-stream PDF /JS object 11 at offset 0x1387 2332 bytes

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