PDF malware analysis — malicious · 883c33806004f4ab

MALICIOUS

PDF

6.5 KB

MD5: 8b077fa76f7eb6905c897b9357eab9df SHA-1: 27ac1f3cdb21e51ed021ab4bda7fef3cf8cbe6f0 SHA-256: 883c33806004f4ab82fdf96a1b4a2359ab550db56a3005b4f2f9ba00babf8d9a

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The critical CVE_2008_2992 heuristic firing suggests the exploitation of a known vulnerability within the PDF structure, specifically related to util.printf. The presence of obfuscated JavaScript and a suspicious extracted file (javascript_obj0006_000.js) further supports malicious intent. The primary attack vector appears to be leveraging this vulnerability to execute arbitrary code.

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` `ae0c3a6a844c9cefed873a3e0580dd53e891719e751480527c90a40e324f5825`	pdf-javascript-stream	PDF /JS object 6 at offset 0x199	5596 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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