PDF malware analysis — malicious · 8cd60d1569c89e06

MALICIOUS

PDF

1.9 KB Created: 2008-08-06 01:42:27 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: fa50c8720b6394b5843760c9d051bcc5 SHA-1: 436f018ecede412d9d51c4540df4b73bcb01ae5a SHA-256: 8cd60d1569c89e06f1e8a9ffac5233101f6bb5cceb030ea10e20cd73237ae609

278 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript triggered by an OpenAction, and specifically uses the 'unescape()' function and the 'Collab.getIcon' method, which are indicators of the CVE-2009-0927 exploit. ClamAV also detected this file as 'Pdf.Exploit.Agent-35646'. The embedded JavaScript stream, named 'javascript_obj0013_001.js', is likely responsible for executing the exploit and downloading a second-stage payload.

Heuristics 8

Collab.getIcon — CVE-2009-0927 critical CVE exact CVE_2009_0927

PDF JavaScript calls Collab.getIcon — CVE-2009-0927 is a stack buffer overflow in Adobe Reader triggered by Collab.getIcon() with a crafted argument. Allows arbitrary code execution. (matched in decompressed stream)
ClamAV: Pdf.Exploit.Agent-35646 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-35646
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
OpenAction trigger high PDF_OPENACTION

PDF has an /OpenAction — code runs automatically when opened
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
JavaScript action low PDF_JAVASCRIPT

PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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.
Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0013_001.js` `8ad8206ed37db0c4486802df5f3618dc02b85cd0aa1cc6e39b2f99c77a422b8d`	pdf-javascript-stream	PDF /JS object 13 at offset 0x367	1230 bytes
Detection ClamAV: Pdf.Exploit.Agent-35646 Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).

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