PDF malware analysis — malicious · b36676be8ca7467c

MALICIOUS

PDF

11.1 KB

MD5: f93a7eb3c6704d080b38710c213918d4 SHA-1: 17ac53390daa2a38d18f6e663701206755773823 SHA-256: b36676be8ca7467c43e921c6e992903af0f3163abe91c7f0ff44e233a1369040

328 Risk Score

Malware Insights

MITRE ATT&CK

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

This PDF file contains embedded JavaScript that exploits multiple CVEs (CVE-2009-0927, CVE-2007-5659, CVE-2008-2992) in Adobe Reader. The JavaScript is heavily obfuscated using variable concatenation and the unescape() function, indicating an attempt to evade detection. The primary goal appears to be the execution of a second-stage payload, leveraging these vulnerabilities to compromise the user's system.

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` `d899dc09f6e7183454a080a8387557c161c44614f962d95b6eec41ee05aad692`	pdf-javascript-stream	PDF /JS object 7 at offset 0x233	48794 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 265 eval/decoder/string-building token(s).
`unescape_var_concat_stage_000.js` `02dda8b2acdc4e6cf025157dee787d1328ce6a0683243002b5d3a45bcc2197a1`	deobfuscated-js	unescape variable-concat decoded JavaScript (decompressed) at offset 0x285	6886 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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