PDF malware analysis — malicious · 41af3b92cf11369d

MALICIOUS

PDF

10.5 KB

MD5: 38423a5a2523a44f90594fff095a6177 SHA-1: ff2929ea1573aac7d4f9adfdd91dac8e8b3f910b SHA-256: 41af3b92cf11369d97d8fc3e7efab2e78e258842fd1bece19d298b1c6e62420e

328 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link T1204.002 Malicious File

The PDF file contains embedded JavaScript that utilizes multiple known Adobe Reader exploits, specifically targeting CVE-2009-0927, CVE-2007-5659, and CVE-2008-2992. The JavaScript is obfuscated using variable concatenation and the unescape function, indicating an attempt to evade detection. This exploit chain is designed to download and execute a secondary payload, although the specific payload and its ultimate target are not detailed in the provided evidence.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

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. (identified after JavaScript deobfuscation)
Collab.collectEmailInfo — CVE-2007-5659 critical CVE exact CVE_2007_5659

PDF JavaScript calls Collab.collectEmailInfo — CVE-2007-5659 is a buffer overflow in Adobe Reader triggered by a long argument or heap-sprayed message field passed to Collab.collectEmailInfo(). Part of a series of Acrobat JS API exploits. (identified after JavaScript deobfuscation)
util.printf — CVE-2008-2992 critical CVE exact CVE_2008_2992

PDF JavaScript calls util.printf() — CVE-2008-2992 is a stack buffer overflow in Adobe Reader triggered by a long format-specifier argument. Widely exploited in the wild after disclosure. (identified after JavaScript deobfuscation)
Multi-CVE Adobe Reader JavaScript exploit kit critical PDF_ADOBE_READER_MULTI_CVE_JS_KIT

One recovered JavaScript stage contains multiple version-gated Adobe Reader exploit branches. This is stronger evidence than independent API keywords: the PDF is selecting old Reader vulnerabilities by viewer version and running heap-sprayed Acrobat JavaScript exploit paths.
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_obj0007_000.js` `e3d1850a5bf83b6b9111c76ff79cd821b6e34b51b06b16af6d7d53a2847ba519`	pdf-javascript-stream	PDF /JS object 7 at offset 0x233	47274 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 241 eval/decoder/string-building token(s).
`unescape_var_concat_stage_000.js` `206c9f0cef081afccafed971331f44e9afa21b31b41c9d9e376eae3e79e6470e`	deobfuscated-js	unescape variable-concat decoded JavaScript (decompressed) at offset 0x284	6746 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

Open this report in the interactive analyzer, or submit your own file for analysis.