PDF malware analysis — malicious · 8250181b1441c1c9

MALICIOUS

PDF

7.6 KB

MD5: 103296d681babe8cc7638e06e74cdf0f SHA-1: 76cdd8580aa5a1950d72d4056d74dfff3ce85ed5 SHA-256: 8250181b1441c1c90fc642ce7db4c4b6c07f9be58e2d05cd54f25a47c23d73cf

178 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. A critical CVE_2008_2992 exploit targeting util.printf was detected, suggesting the JavaScript is used to leverage this vulnerability. The embedded JavaScript file 'javascript_obj0006_000.js' was extracted, and its presence along with the exploit points to a malicious intent, likely to download and execute a second-stage payload.

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` `5a6b32905fcf3c630142c4d5ea19c60fcd4ba2bcb51652718e4f4ca510cc1b32`	pdf-javascript-stream	PDF /JS object 6 at offset 0x19B	6545 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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