Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d414b124199a327…

MALICIOUS

PDF

575.6 KB Created: 2010-05-09 21:13:51 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 2.5.000_PHP4 (http://www.tcpdf.org))
MD5: e40f81798085fd3a62a6bedda1c64647 SHA-1: 47c0c70b60585d5bf8afd1885a6ed43ac11a59c5 SHA-256: 8d414b124199a32740b5dad44bcf74acc89b67c45e51ec23d308c056f0c43fed
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.003 Phishing: Spearphishing Attachment T1204.002 Malicious File: Malicious PDF

The PDF contains a hidden external HTML iframe, a common technique for redirecting users to malicious sites or initiating further exploits. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URL 'http://www.codeforum.cn/free/max1.htm' is flagged as unknown and is a potential indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9870

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

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