Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f5490d870fb542a…

MALICIOUS

PDF

44.9 KB
MD5: 8c56ebd35c6eec09f2a9b972aff8c097 SHA-1: 56c698e48a9c5e50233620c5b6b4224857e61cb5 SHA-256: 4f5490d870fb542a0d6f7cff3a94387719dc223beb523df6e798699dcbb0dc90
84 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. This JavaScript is likely used to download and execute a secondary payload, as suggested by the ClamAV detection of 'Heuristics.PDF.ObfuscatedNameObject'. The presence of XFA form elements (PDF_XFA) is also noted. While the document body is largely unreadable, the technical indicators point towards a malicious PDF designed for payload delivery.

Heuristics 5

  • 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.
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://ns.adobe.com/xdp/
    • http://www.xfa.org/schema/xci/2.6/
    • http://www.xfa.org/schema/xfa-template/2.6/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0012_000.js
9f3a75c62ae7feb68924884efbe8c9f124dad2499b30400866b5184415a35407		 pdf-javascript-stream PDF /JS object 12 at offset 0xA1F6 3274 bytes

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