PDF malware analysis — malicious · fdc8cc2f5887aaa3

MALICIOUS

PDF

5.7 KB

MD5: 9d34ce5e603ce9a0e71247ac27fd3a14 SHA-1: 21f9e541d03458ab4a6f9f72f13863d4a1b6b78a SHA-256: fdc8cc2f5887aaa361549076a21a31a2c9825b09a183871a604e5032bc4b92b9

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File

The PDF file contains embedded JavaScript and triggers a critical heuristic for CVE-2008-2992, indicating an exploit attempt. The JavaScript stream is obfuscated, and a specific JavaScript file was extracted. The presence of `util.printf` is a strong indicator of exploitation for this CVE. The document body is unreadable, but the technical indicators point to a malicious PDF leveraging a known vulnerability.

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: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
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` `e187e7aa7e8a4e648c6f1c06edb90249a7af2d86caebb05b081f474b20be4637`	pdf-javascript-stream	PDF /JS object 6 at offset 0x199	4894 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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