PDF malware analysis — malicious · 17a723f88545968d

MALICIOUS

PDF

629.8 KB Created: 2011-04-27 02:39:09 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 3.0.015 (http://www.tcpdf.org))

MD5: 9c5412c914d7d08e540999a9986f08c4 SHA-1: 424ae2337992be17daa20def0b83c870393fb83e SHA-256: 17a723f88545968de359bd8b58a90e2cec64f701f9066010b62a120055b851cd

100 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution

The sample is a PDF file that contains a marker for the CVE-2008-2551 exploit, which is known to download and execute arbitrary code. The presence of an embedded URL pointing to a .exe file further supports this. The ML classifier also flagged this PDF as malicious with a high confidence score.

Machine Learning

Nyx PDF Classifier malicious score 0.9653

Heuristics 3

C6 Messenger DownloaderActiveX exploit critical CVE exact CVE_2008_2551

PDF stream bytes contain HTML/ActiveX content configuring the vulnerable C6 Messenger DownloaderActiveX control with propDownloadUrl and propPostDownloadAction=run. This is the published exploit shape for CVE-2008-2551.
Optional Content Group with action trigger low PDF_OPTIONAL_CONTENT

Optional Content Group (layer) co-occurs with an action trigger — content can be selectively hidden from viewers or scanners while the action still fires on open
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://artisanballoonz.com/system/system.exe
- http://c6.community.alice.it/download/DownloaderActiveX.cab#Version=1,0,0,1

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_002_off000006af.bin` `80ce46be3b4d5733393d911e720cc341eac961413bc8841086c1643fee9fc14b`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x6AF	73272 bytes

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