PDF malware analysis — malicious · 8f15b4eb222c436f

MALICIOUS

PDF

5.8 KB

MD5: f03699f20633d22c31d097b67f93ce25 SHA-1: 3bed43e846c0ffb4166602abe16878d91831b39f SHA-256: 8f15b4eb222c436fcd9aaad91470e2cb8b1524ee8e562b27f56c5b8e1aba969d

178 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.001 PowerShell

The PDF file contains embedded JavaScript and triggers a critical heuristic for CVE-2008-2992, indicating exploitation of a known vulnerability. The JavaScript is obfuscated and likely used to download and execute a second-stage payload. The presence of `util.printf` is a strong indicator of this specific exploit.

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` `726d9d1ea0f3723e18aef018d2e0fd41be2ac5bc5a7b1956c103891e0dddfa11`	pdf-javascript-stream	PDF /JS object 6 at offset 0x1AF	4950 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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