PDF malware analysis — malicious · 543c9b952fd49919

MALICIOUS

PDF

2.5 KB Created: 2008-14-12 03:25:50 Authoring application: Neon v.1.0.5 ru (via Neon v.1.0.5 ru PDFLib)

MD5: a5d94c9ecf604efe88368036dcaedbd8 SHA-1: 7afe1ae71bc8b550a8899fbacddc42e1c560fcc3 SHA-256: 543c9b952fd499191420ad444603287b609058ed002ec72bd1355a1a5066e95d

158 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript triggered by an OpenAction, indicating an attempt to automatically execute code upon opening. The critical CVE-2008-2992 heuristic firing, specifically related to util.printf, strongly suggests exploitation of this known PDF vulnerability. The embedded JavaScript stream, identified as 'javascript_obj0013_001.js', likely contains the malicious code responsible for downloading and executing a second-stage payload. The presence of JavaScript actions and streams, combined with the specific exploit detection, points to a malicious PDF designed for exploitation.

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)
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 (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_obj0013_001.js` `043f8b0bf3432e549b9e3c41aff1aede4565533603c801bbc2d75bed3d7eec2f`	pdf-javascript-stream	PDF /JS object 13 at offset 0x368	3000 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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