Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3a8807412197d80…

MALICIOUS

PDF

811.9 KB Created: 2010-09-14 21:11:12 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 2.5.000_PHP4 (http://www.tcpdf.org))
MD5: b0bc24edb96241a6f9ef3ec20aedb645 SHA-1: 1f83fc6a19ef777e5dba35c1315cca660ed10ca9 SHA-256: a3a8807412197d80ac4e9f5d20dd793d4cfb583dbdb5d49fccd6884fc7d23569
100 Risk Score

Malware Insights

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

The PDF file contains a hidden HTML iframe, which is a common technique for redirecting users to malicious websites. ClamAV also detected this file as Html.Spyware.IMG-7. The embedded URL points to a suspicious domain, likely serving malicious content. The presence of a hidden iframe suggests an attempt to deliver a payload or phish credentials.

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.

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