PDF malware analysis — malicious · fd5308043689e85c

MALICIOUS

PDF

23.8 KB

MD5: b0a459947f236bb83bc1ea9f01d36599 SHA-1: e8ad2a258c7b2b99abfa5c8df03009ef9e5172ec SHA-256: fd5308043689e85c9d174822ff2fc06734a8ed75c50c902cfd8864d19fd6cebc

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains obfuscated JavaScript that leverages the CVE-2008-2992 vulnerability, specifically using the util.printf sink. The JavaScript is designed to be executed within Adobe Reader, indicating an attempt to exploit a known PDF reader flaw. The primary goal appears to be the execution of a secondary payload, as suggested by the heuristic firings and the nature of the exploit. No specific family could be identified due to the generic nature of the exploit.

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` `4daa818b151c83d394b20bbc01fd35fe056c45c12650059e7a0ed4dd2fbc7f64`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3999 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 6 long base64-like blob(s).
`javascript_obj111712_001.js` `7d9b673f092dea71faf9e220e643850d0b5df628ffbc3ca9b16451f1365a7d75`	pdf-javascript-stream	PDF /JS object 111712 at offset 0x1163	15145 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` `298aa9d46d962527a0d09aaefd1c750e9d1cf6518876803e38a24b021604c411`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x4CC2	4625 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).
`legacy_pdfkit_stage_000.js` `2ce519949289064cac4d9ec5e2f03616b7ef69d371aebd8dd98fe04454eb0f63`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x1163	1413 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` `e282e90aa5eca950df2ca38b720cea9e6025f175e744e4f996f2c8820ba8b08c`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x4CC2	385 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_002.js` `10f9af31fd92b3b91a9b4519319d79eb5930aa1bb010269b5e328b0105274f48`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0x1163	1799 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).

Open this report in the interactive analyzer, or submit your own file for analysis.