PDF malware analysis — malicious · f541b2fcd0b35a07

MALICIOUS

PDF

651.6 KB Created: 2011-05-26 13:19:34 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 3.0.015 (http://www.tcpdf.org))

MD5: 3590dcc913bab2f56d96e8b280c22399 SHA-1: c630750668085cb8aba3ca3cdf880004204a94b5 SHA-256: f541b2fcd0b35a07692acf42bcd6246ecd4af6cfad96a1fbaa58fdf4f329c483

76 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.001 PowerShell

The sample is a PDF file that contains an embedded JavaScript stream and triggers the CVE-2008-2551 exploit. This exploit is known to download and execute arbitrary files. The embedded URL 'http://artisanballoonz.com/system/system.exe' is highly suspicious and likely the payload. The PDF's structure also indicates the presence of an optional content group with an action trigger, further supporting the exploit delivery.

Heuristics 4

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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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_off0000111a.bin` `80ce46be3b4d5733393d911e720cc341eac961413bc8841086c1643fee9fc14b`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x111A	73272 bytes

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