PDF malware analysis — malicious · 41a27b29cdfdfecf

MALICIOUS

PDF

811.9 KB Created: 2010-09-19 21:22:54 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 2.5.000_PHP4 (http://www.tcpdf.org))

MD5: bfa2b02c0efbe60d75c339a2cd6702fe SHA-1: 2c34823f151fbaa65e36d3dfdbe31ef94f4260ef SHA-256: 41a27b29cdfdfecf96de63e02d117c562c4117a29026cd20911bce69f6cc5753

100 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file was flagged by ClamAV as Html.Spyware.IMG-7, indicating a known malicious signature. Static analysis revealed a hidden HTML iframe embedded within the document, a common technique to redirect users to malicious sites. The embedded URL, http://www.codeforum.cn/free/max1.htm, is likely part of this redirection chain. The presence of a hidden iframe and the ClamAV detection strongly suggest a malicious intent, possibly for phishing or malware delivery.

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

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_004_off0000ba7c.bin` `a5337ef1f5a0dfe4dc8fa6b4f3ef847a53624800b5928a0eeef5b888ceecaabc`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0xBA7C	264072 bytes

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