PDF malware analysis — malicious · 19f26d41964071a8

MALICIOUS

PDF

6.4 KB

MD5: 840d74fb7c33fc5937fcf24133bd29ae SHA-1: e9c812270a74326d133bdef12ecad11024601127 SHA-256: 19f26d41964071a820d15bc01528cecb02ddba1c59f04e21c2e3c98f051ec7af

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript that utilizes the `unescape()` function and a `util.printf()` call, indicating exploitation of CVE-2008-2992. This vulnerability allows for arbitrary JavaScript execution within the PDF reader. The embedded JavaScript is likely designed to download and execute a second-stage payload, although the specific payload and its destination could not be determined from the static analysis.

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-24344 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-24344
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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0006_000.js` `33bb09299427eb29f1ef6ed54da1078ae1bfdf0beb543a6e2b886325f68f1341`	pdf-javascript-stream	PDF /JS object 6 at offset 0x1A5	5287 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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