PDF malware analysis — malicious · 483d6fd23feb467c

MALICIOUS

PDF

10.8 KB

MD5: 8aa6738426b0ac897e64b2573a6d0bc3 SHA-1: 81ac8bc8143b8e212f7b92f416b21ccbbc7dde55 SHA-256: 483d6fd23feb467cfb7ff8693c79e7b8bffc8c3c54a39502f6a2820e6914622e

118 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_UNESCAPE. A critical heuristic identified the CVE-2008-2992 exploit, which utilizes the util.printf function. The embedded JavaScript contains a call to unescape() with a repeating sequence of %u0A0A, suggesting an attempt to exploit this vulnerability. The script's purpose is likely to download and execute a second-stage payload, although the exact mechanism is obfuscated.

Heuristics 5

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.
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0025_000.js` `f1e926f06451efaa61f598c69b0f5efa21fe58f1f8aa92ee7e706aa1ebff2d94`	pdf-javascript-stream	PDF /JS object 25 at offset 0x1D4D	2824 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).
`javascript_obj0025_001.js` `f6bb1570182a1dad745a7497dcf46a5766d52dfa5e4dbbc74ae8e88051775342`	pdf-javascript-stream	PDF /JS object 25 at offset 0x1D4D	43 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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