PDF malware analysis — malicious · 367bd2653afd358c

MALICIOUS

PDF

20.7 KB

MD5: 12d4945f790595d0587ba1a88f5bfd2d SHA-1: 9e22af078abc33ad064dabf533932a321909fef7 SHA-256: 367bd2653afd358c7180d55535dcee39140b33adf366e7a54bbac0c2cebe12b7

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.001 Malicious Link

The PDF file contains embedded JavaScript that leverages the CVE-2008-2992 vulnerability. The heuristic firings indicate the use of eval() and printf() functions, common in exploit kits targeting older Adobe Reader versions. The JavaScript is heavily obfuscated, but the core functionality appears to be the execution of a second-stage payload. The extracted JavaScript files and the critical CVE finding strongly suggest an exploit attempt.

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. (identified after JavaScript deobfuscation)
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
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 6

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj111711_000.js` `e6fe71ea989e7993a53e05241f2a660ec75d9944b487430103bc56b42672a67e`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3358 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 5 long base64-like blob(s).
`javascript_obj111712_001.js` `103cdb166d19f729709385e1c253ad3e2d3876dd68b1d0e2f5114f87e4bf2eca`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xEE2	12354 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 4 long base64-like blob(s).
`javascript_obj111713_002.js` `cfa8ffd366b1e41c8ab85ea309b429394651d8371f78d325c04b07bb0892a4ad`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x3F5A	4923 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 4 long base64-like blob(s).
`legacy_pdfkit_stage_000.js` `b0f96e5eb04cb2b54416cd41df68d468db51f44cb85c4be991a2093dd6964069`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xEE2	1420 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_001.js` `34feebbbf0ee64a52f53dce0c98530b4b073203d6a605ba6fc0e3a735084f8c8`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x3F5A	384 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_002.js` `38cf80e600c6023a9d2da18726bfac9442466457138ed488864bbc9b1419fe13`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xEE2	1805 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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