PDF malware analysis — malicious · 2dc4c0724dc59bcc

MALICIOUS

PDF

6.5 KB

MD5: 85646c02bfc7c5f0d3f96c8342ff0f47 SHA-1: 753bb0ce47550980aaaebad7a8a9e4a0bdcb1a66 SHA-256: 2dc4c0724dc59bccae12aa439f89daa4c7cec4779c97a12497cab5c2dc424786

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The critical CVE_2008_2992 heuristic firing suggests exploitation of a known vulnerability in PDF readers. The PDF_UNESCAPE heuristic indicates obfuscation techniques were used within the JavaScript. The embedded JavaScript is likely designed to download and execute a second-stage payload, as suggested by the nature of the CVE-2008-2992 exploit.

Heuristics 6

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. (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` `810d69ea5c29f124acf1113ad65a5dd2fdf7abf315e0db32519eafcdf3452b47`	pdf-javascript-stream	PDF /JS object 6 at offset 0x191	5608 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 2 long base64-like blob(s).

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