PDF malware analysis — malicious · 88f4ec1a2d4f1649

MALICIOUS

PDF

1.2 KB

MD5: e0289c171642f6d9fdb3d213132ca68b SHA-1: 80cf603d1ca4b2301d01125a89ba60dc687873b2 SHA-256: 88f4ec1a2d4f1649b5e1ff884c9321f13ac44410744d1c289464cc5021de6b63

208 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains embedded JavaScript that leverages the 'Collab.getIcon' method to exploit CVE-2009-0927, a known vulnerability in Adobe Reader. The JavaScript uses 'unescape' and concatenates strings, indicating an attempt to obfuscate malicious code. This exploit allows for arbitrary code execution, likely to download and run a second-stage payload.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

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.
PDF JavaScript exploit cluster critical PDF_JS_EXPLOIT_CLUSTER

PDF combines an executable JavaScript/action surface with exploit staging indicators such as eval/unescape/fromCharCode, XFA script content, or a related CVE pattern. Benign form JavaScript remains low-severity, but this correlated cluster is high-confidence malicious behavior.
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits
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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `7913f7a9a9a742ab3460e1e0c2f7fee22d904d215c183d5de9265cc88bf68d30`	pdf-javascript-stream	PDF /JS object 7 at offset 0x2B4	302 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0007_001.js` `e12aa958a279c4ec8d077820657b0dcbcf54e6697b3bb9a6fa717b63964eeaea`	pdf-javascript-stream	PDF /JS object 7 at offset 0x2B4	40 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`combined_document_js_000.js` `526dc1b3e361c9bbe6a903d25d06455af9a27a7654f4ddd6cab63332176661e6`	deobfuscated-js	combined document JavaScript streams at offset 0x2B4	343 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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