PDF malware analysis — malicious · e55bd15b0743c221

MALICIOUS

PDF

6.7 KB

MD5: d0a995b3f605f16e8f4c8fde664b632b SHA-1: dcb5897352cd8f6cc81765b80cee5222752c6c92 SHA-256: e55bd15b0743c22122dfc5035b4210810dabaea7817bb4f0701bd7383b8bc1d8

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 finding is the CVE-2008-2992 exploit, which leverages a util.printf function within the JavaScript to likely achieve arbitrary code execution. The embedded JavaScript stream, named 'javascript_obj0006_000.js', is highly obfuscated and suspicious, suggesting its purpose is 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` `fdcbb379acccff0aacf2d117e2b3a8d3f7c1bfbfad8fcf0521ec4344ed2debae`	pdf-javascript-stream	PDF /JS object 6 at offset 0x1A7	5542 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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