PDF malware analysis — malicious · 216a1b095dbcf709

MALICIOUS

PDF

49.5 KB Created: 2010-06-11 15:30:10 UTC

MD5: dfefb413804000372dcda10bc0e07965 SHA-1: 5bfa33b1ce4152b3e9bd4c8a1f0196ca840bf047 SHA-256: 216a1b095dbcf7099f3b91633d5b663554bda1363d8a6a31323a28d4328c380e

220 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File

The PDF file contains embedded JavaScript and triggers an OpenAction, indicating an attempt to automatically execute code upon opening. The critical heuristic firing for CVE-2008-2992, specifically related to util.printf, strongly suggests exploitation of this known PDF vulnerability. The ClamAV detection further confirms its malicious nature as a dropper. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload.

Heuristics 7

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.
ClamAV: Pdf.Dropper.Agent-7209928-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7209928-0
OpenAction trigger high PDF_OPENACTION

PDF has an /OpenAction — code runs automatically when opened
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits
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_obj0009_001.js` `0bf1b02a274b798930e1fda9e5c32950f38a53d592035e2556c93af07c54716a`	pdf-javascript-stream	PDF /JS object 9 at offset 0x24F	3486 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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