PDF malware analysis — malicious · 39a59250124f33a9

MALICIOUS

PDF

1.5 KB

MD5: 18274dbc6eda4b37d3318ebfa416d49f SHA-1: fd8ae12906f2c1a8db260b797c96d07933af2efb SHA-256: 39a59250124f33a92b98650cb79a030f50548f257c6961af21bcef131e9c9b83

150 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: Malicious File

The PDF sample contains embedded JavaScript that leverages the CVE-2009-0927 vulnerability. This exploit is known to be used for arbitrary code execution, typically to download and execute further malicious content. The ML classifier strongly supports the malicious nature of this PDF. No specific family could be identified from the available evidence.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

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. (identified after JavaScript deobfuscation)
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj111111_000.js` `4ed8a0fafd918d67ac169f5cfcc7ef14a6c2d75ac31bfab8a457a97181bece94`	pdf-javascript-stream	PDF /JS object 111111 at offset 0x160	2202 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`combined_document_js_000.js` `3785bec8179fe99f5b4d9d911798a791a4e223422f5021027b9992f23cb82833`	deobfuscated-js	combined document JavaScript streams at offset 0x160	2233 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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