PDF malware analysis — malicious · 2c475905514e5de3

MALICIOUS

PDF

6.3 KB

MD5: 52dde960ad47508e224721ddaae82e03 SHA-1: 3a9c9cfe758c39b2dabadd8865954c84d9e4c137 SHA-256: 2c475905514e5de3c70dcddd2f08629f5e8997cd25d115c45150cf602e62732b

216 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File T1566.001 Spearphishing Attachment T1204 User Execution

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. A critical finding is the exploitation of CVE-2008-2992 via a util.printf call within the JavaScript. The embedded JavaScript file, 'javascript_obj0006_000.js', is highly suspicious and likely responsible for downloading and executing a secondary payload. The obfuscated nature of the JavaScript and the use of a known exploit point to a malicious intent.

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)
Suspicious extracted artifact high 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.
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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0006_000.js` `aa84e1381b04c3e8425b5ca20f16dd4bf4f52ccc71a1b6a241efda838fcf1f7b`	pdf-javascript-stream	PDF /JS object 6 at offset 0x19F	5316 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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