Malicious PDF — malware analysis report

Static analysis result for SHA-256 36c39e5bfcbafb38…

MALICIOUS

PDF

575.6 KB Created: 2010-05-12 21:22:03 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 2.5.000_PHP4 (http://www.tcpdf.org))
MD5: 134c7cf5507b89496054d0c11962ac4a SHA-1: 9f391c11d57757469d7a9f18e5e9bb9e3c04efe1 SHA-256: 36c39e5bfcbafb384ccbc66ddf75551d93f84c274480d7abb10f20e6c23ad7ab
100 Risk Score

Malware Insights

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

The PDF file contains a hidden HTML iframe, a common technique for redirecting users to malicious sites. The ClamAV heuristic also flags this as Html.Spyware.IMG-7. While the document body is heavily obfuscated and unreadable, the presence of the hidden iframe and the ClamAV detection strongly suggest a malicious intent, likely related to web-based threats or drive-by downloads. The embedded URL http://www.codeforum.cn/free/max1.htm is marked as unknown and is therefore included as a potential IOC.

Heuristics 3

  • ClamAV: Html.Spyware.IMG-7 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Html.Spyware.IMG-7
  • 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 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://www.codeforum.cn/free/max1.htm
    • http://ns.adobe.com/xap/1.0/
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/iX/1.0/
    • http://ns.adobe.com/exif/1.0/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/photoshop/1.0/
    • http://ns.adobe.com/tiff/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://purl.org/dc/elements/1.1/
    • http://www.iec.ch

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000b7a7.bin
a5337ef1f5a0dfe4dc8fa6b4f3ef847a53624800b5928a0eeef5b888ceecaabc		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xB7A7 264072 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.