PDF malware analysis — malicious · 9ad5ad619d5859f9

MALICIOUS

PDF

6.0 KB

MD5: dee59ee0ebc67ed0d1d8c6618e1f8f89 SHA-1: 4d9c11b38908172a700fec384779af1a098c6323 SHA-256: 9ad5ad619d5859f9d9ccc90e998ac0dbad5e9963bd856b1509922f78b4781c13

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.002 Malicious JavaScript T1055.001 Process Injection

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 vulnerability related to util.printf. The embedded JavaScript stream, identified as javascript_obj0006_000.js, is likely responsible for executing malicious code. The ClamAV detection further supports the malicious nature of the file. The primary attack vector appears to be leveraging a PDF vulnerability to run obfuscated JavaScript, which is a common method for delivering secondary payloads.

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` `b5ff087a2b5d94e3a10714bcb3eb3aeaf1f7e6fa3918074ce15bb5b6f521ea0c`	pdf-javascript-stream	PDF /JS object 6 at offset 0x1AB	5179 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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