PDF malware analysis — malicious · cc26c4ebcc8f1d40

MALICIOUS

PDF

6.4 KB

MD5: 4854d19f996e91201207e5f0ac944005 SHA-1: 350bd54190f96bab0279caf58edb9efe8c568acc SHA-256: cc26c4ebcc8f1d4053420240bb30a518cbb59e39b369ec2b6ecfe26c0ef2dea6

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. A critical heuristic identified the use of util.printf, which is associated with CVE-2008-2992, a known vulnerability in Adobe Reader. The presence of an unescape() call further suggests obfuscation of malicious JavaScript code. The embedded JavaScript stream, identified as javascript_obj0006_000.js, is likely responsible for exploiting this vulnerability to download and execute a secondary 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` `4b64b3dbbb70d5d4ac19eabb936950446892f5eb939505ef0b6796ebb966a427`	pdf-javascript-stream	PDF /JS object 6 at offset 0x187	5336 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).

Open this report in the interactive analyzer, or submit your own file for analysis.