PDF malware analysis — malicious · 366d0ddd0a298759

MALICIOUS

PDF

6.8 KB

MD5: 5cb527dac2a9599db32a1415fc64e1a2 SHA-1: ddd938f71530fe2e059c8af092fe7b3ac7beb0e5 SHA-256: 366d0ddd0a298759657719bff1ae7ed9c5d493ae454730ce9ef918311a6f7550

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. A critical alert for CVE_2008_2992, specifically mentioning util.printf, suggests exploitation of this vulnerability. The presence of an unescape() call further points to obfuscated JavaScript. The extracted JavaScript artifact, javascript_obj0006_000.js, is likely responsible for executing the exploit and downloading a secondary payload, although its specific actions are not detailed here. The ClamAV detection also confirms the malicious nature of the file.

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` `1e95a3f04050c230567b97219748e88b33f2a082acd6411d202a71dcd853e7ec`	pdf-javascript-stream	PDF /JS object 6 at offset 0x195	5686 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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