PDF malware analysis — malicious · 7f51f261f03890f2

MALICIOUS

PDF

26.3 KB

MD5: 3184a573808e33bd11cea31f815f760e SHA-1: b60183deb9a1bdfef2f957511be27afd488f65a9 SHA-256: 7f51f261f03890f22699ceec4c23f0dc18520cd601ab72b91d4244dcfa925a20

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript that utilizes eval() and unescape() functions, indicative of obfuscation. The critical heuristic firing for CVE-2008-2992 confirms the exploitation of this vulnerability via printf-style string formatting in JavaScript. The embedded JavaScript streams are likely responsible for decoding and executing a second-stage payload, as suggested by the 'encoded stage' detail. No specific malware family is identifiable from the available evidence.

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` `e1434ca61d7ae6cd1b9c78b11ad19765692e5f85d2712f60d574b3da5a3c38c5`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3889 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` `86dfde29dbd14e01b87aa8d5f549e11df98f5ca7b3e92844ffae05396c948348`	pdf-javascript-stream	PDF /JS object 111712 at offset 0x10F5	17662 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_obj111713_002.js` `d0dd3abed242c0280187492071acc1add971c94ce44e7a011fe701c3a5df1515`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x5629	4777 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` `b35fba90cd57f3b22ddfcdbeb45a0459547cca1fe1a3c452a0cd1b7f062d011c`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x10F5	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` `df2e8f38acbcede11c3621c62802a425613ee3b105933e1debbf6452a55bb89f`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x5629	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` `378d287993b519c27ad10f8df7ab907265bc069287441f87e53a32d5b331a89e`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0x10F5	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).

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