PDF malware analysis — malicious · 3c89fd2250101f71

MALICIOUS

PDF

2.3 KB

MD5: 3e530799dc2ecdfbf4faff9e2fb39f3e SHA-1: e0b8cb86cf29e21d2c5159e6ab41e95fe2e80c76 SHA-256: 3c89fd2250101f71184cafb322656e699edc9e13779772e1b6b346d6917aeebd

216 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript that leverages the CVE-2008-2992 exploit, indicated by the util.printf heuristic. This exploit is known to execute arbitrary code. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload, although the exact nature of the payload cannot be determined from the provided evidence. The ClamAV detection further confirms the malicious nature of the file.

Heuristics 6

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)
ClamAV: Pdf.Exploit.Agent-13358 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-13358
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
Suspicious extracted artifact high 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.
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.

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj263984_000.js` `1779506cb47dceedf65431fea7b1fc4ea1274d093dbffa5af9248659e8f6d550`	pdf-javascript-stream	PDF /JS object 263984 at offset 0x197	6974 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` `12ed3fc6b69fee5bf8f44aa28ed8c76a7893a006532e642acf3cd7030eef2dc1`	pdf-javascript-stream	PDF /JS object 263985 at offset 0x6C0	153 bytes
`javascript_obj263986_002.js` `76d7d16129f77a52033d4a792a6a7b4e97bce5a021c6351b5b9ae46b23038ac1`	pdf-javascript-stream	PDF /JS object 263986 at offset 0x790	521 bytes

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