PDF malware analysis — malicious · 85bb47264dda060a

MALICIOUS

PDF

6.3 KB

MD5: 523ae336c0f9c62d8e2a5534c2bfdc30 SHA-1: da6d330cfd335283822127057625249766b99f79 SHA-256: 85bb47264dda060aa568e5b8acc3201b69d32ecdec8b5ab6c00a7d1ae21db2a2

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious JavaScript

This PDF file contains embedded JavaScript, which is obfuscated and utilizes the unescape() function. A critical heuristic firing indicates exploitation of CVE-2009-0927 via the Collab.getIcon method. This suggests the document is designed to exploit this known vulnerability to execute arbitrary code, likely to download and run a secondary payload.

Heuristics 6

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: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
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_obj0006_000.js` `1389d1377612c988ea33c1f9b708184431b3d34c711fa2f640c94ab3e8dbdc58`	pdf-javascript-stream	PDF /JS object 6 at offset 0x18F	5226 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s). Carved artifact contains 2 long base64-like blob(s).

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