Malicious PDF — malware analysis report

Static analysis result for SHA-256 62542e337a1220fb…

MALICIOUS

PDF

811.9 KB Created: 2010-09-10 21:03:07 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 2.5.000_PHP4 (http://www.tcpdf.org))
MD5: c2e0c4cc83ccd2681dd2be10666aa5e1 SHA-1: 9f1146ebb0df2a1a1aca7ff189f1975962fac0d0 SHA-256: 62542e337a1220fbc9af36cdf6efc232faa0a36d917863ffebc41cd6c591720f
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains a hidden iframe pointing to an external URL, which is a common technique for delivering malicious content or redirecting users to exploit kits. The presence of an embedded URL suggests an attempt to lure the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9851

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://www.gnu.org/copyleft/gpl.html

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000ba7c.bin
a5337ef1f5a0dfe4dc8fa6b4f3ef847a53624800b5928a0eeef5b888ceecaabc		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xBA7C 264072 bytes

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