Malicious PDF — malware analysis report

Static analysis result for SHA-256 93eb1a58e824fc6a…

MALICIOUS

PDF

45.6 KB
MD5: 71f8ad752c13ea11d08ab22fa6d63184 SHA-1: a793c850f5484595c513b9194fe02b11031145a2 SHA-256: 93eb1a58e824fc6a933a95d5173a7b34150a6ff5e649b08885d82b6895e45cf9
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 multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. The presence of XFA forms (PDF_XFA) is also noted. While the document body is heavily obfuscated and unreadable, the embedded JavaScript is the primary indicator of malicious activity. This script is likely responsible for downloading and executing a second-stage payload, a common technique for malware delivery. The ClamAV detection of 'Heuristics.PDF.ObfuscatedNameObject' further supports the malicious nature of the file.

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
0266b6080061b578797260ca96aa049cda045048ba756dc7c0eabcef7b0b83a2		 pdf-javascript-stream PDF /JS object 12 at offset 0xA1FC 4044 bytes

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