PDF malware analysis — malicious · d1dca0a925d9dee3

MALICIOUS

PDF

2.3 KB

MD5: bd2c7b8606fd91e4f5121d03fe59dcfd SHA-1: 059a16e6882294ce8c337e3f8a24e5e7e1a411f9 SHA-256: d1dca0a925d9dee3d1daebf094fc5875c3a19c5599994e541e6f91f0f3da79c3

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.001 Malicious Link/Object

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. A critical finding is the CVE-2008-2992 exploit, triggered by a util.printf call within the JavaScript. This exploit is designed to execute arbitrary code. The presence of unescape() further suggests obfuscation of malicious JavaScript. The extracted JavaScript streams are likely responsible for downloading and executing a second-stage payload.

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. (matched in decompressed stream)
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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj263984_000.js` `65be9aebbcb307884e39c3cfa16572597c2721fec9c39f7a46595de114847817`	pdf-javascript-stream	PDF /JS object 263984 at offset 0x197	6903 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 10 eval/decoder/string-building token(s). Carved artifact contains 3 long base64-like blob(s).
`javascript_obj263985_001.js` `3af7971c08eeb18b59edf4a7d0cceeb4fdb4f16d2c5d4d812143e5c487a04b8d`	pdf-javascript-stream	PDF /JS object 263985 at offset 0x6A9	154 bytes
`javascript_obj263986_002.js` `ebfabcefcc2225ec67c7e85a9bea4dcb39cda66b3c68e460bba36accff0f1eb2`	pdf-javascript-stream	PDF /JS object 263986 at offset 0x77C	516 bytes

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