PDF malware analysis — malicious · 4fb99879d3d42693

MALICIOUS

PDF

6.4 KB

MD5: 3a972ec0a03c57b14f4fe88282fee89b SHA-1: 67adb3da83ef7c58db22ec68a4499b29bae9a282 SHA-256: 4fb99879d3d426937045be7b87c9211a8408629f65cf7e2f36f85723f4d7ed31

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/Script Execution T1204.002 Malicious Link/URL

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including 'PDF_JAVASCRIPT' and 'PDF_JS'. The critical 'CVE_2008_2992' firing suggests exploitation of a specific vulnerability within the PDF reader. The embedded JavaScript, identified as 'javascript_obj0006_000.js', likely facilitates the download and execution of a second-stage payload. The presence of 'unescape()' further points to obfuscation techniques commonly used to hide malicious 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` `d1b5694eb9cbc468f139acc7a49d84e38089fb5baeba66d43ca034e3c35dcbab`	pdf-javascript-stream	PDF /JS object 6 at offset 0x19F	5588 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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