Malicious PDF / .VIR — malware analysis report

Static analysis result for SHA-256 47d89e26148e2468…

MALICIOUS

PDF / .VIR

233.0 KB
MD5: 5388e2f93caba2d3ec55e6a481fa4141 SHA-1: edd71c836c747a04dcfa159245de5e664ad2b7e1 SHA-256: 47d89e26148e2468242376b105697a235e20ea5dce8500cede3545da988387ec
80 Risk Score

Malware Insights

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

The PDF contains an embedded script payload and a hidden HTML iframe, indicating an attempt to redirect the user to external malicious content. The heuristics suggest the PDF is designed as a lure, painting images without meaningful text, likely to obscure its malicious intent. The embedded URLs point to suspicious domains, further supporting the conclusion that this PDF is part of a malicious distribution chain.

Heuristics 4

  • PDF contains hidden external HTML iframe high PDF_HIDDEN_HTML_IFRAME
    PDF bytes contain a hidden zero-size HTML iframe pointing to an external HTTP(S) URL. This is a strong malicious dropper/redirect indicator and is not expected in ordinary PDF content.
  • Embedded script payload in PDF stream medium PDF_EMBEDDED_SCRIPT_PAYLOAD
    PDF stream bytes contain an HTML/XFA <script> tag without accompanying Windows shell-execution primitives — common in accessible XFA forms but worth surfacing for analyst review.
  • PDF paints image(s) but contains no text operators medium PDF_IMAGE_ONLY_LURE
    PDF has 1 image XObject(s) and the content stream contains no text-emitting operators (BT/ET, Tj, TJ, ', ") in either raw bytes or decompressed streams — this is the screenshot-as-PDF pattern used to bypass text-based scanners and to deliver instructions purely through rendered pixels. It is informational unless paired with invisible links or risky URI context.
  • 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://jbns2.cydoor.com/bns/new/B_723800.htm
    • http://jgrokster.cjt1.net/HTM/316/0/JavaSiteReport.asp?AW=316&PR=203258&SQ=7238&AS=0&ORD=31452&LV=6000&L=0
    • http://adroar.com/grokster_ads.shtml
    • http://adroar.com/cgi-bin/adjuggler.cgi?img_click=/grokster_client
    • http://adroar.com/cgi-bin/adjuggler.cgi?img_only=/grokster_client

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_pdf_script_00018000.bin
249234408ca60e01341398f71c569ae0792813723949bebe6be127166349705e		 pdf-embedded-script PDF decompressed stream script payload at offset 0x18000 238608 bytes

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