PDF malware analysis — malicious · 204148c96175be81

MALICIOUS

PDF

1.8 KB

MD5: 32434227517fcc8a50d126224155403c SHA-1: 3bba5c1e845a4d8eabf2750c7ca9ddd14582ffd7 SHA-256: 204148c96175be811b2824ee9601ae0f65d85f31fecb5ad31ec0338064ec13ba

104 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: Malicious File

The PDF file contains JavaScript and utilizes ASCIIHexDecode and ASCII85Decode filters, indicating obfuscation. The critical heuristic firing for CVE-2008-2992, specifically the use of util.printf, confirms exploitation of this vulnerability. The embedded JavaScript is likely responsible for executing the exploit payload.

Heuristics 5

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)
ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX

Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
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.
ASCII85Decode filter (with exploit indicators) low PDF_FILTER_85

ASCII85 encoding filter present alongside exploit delivery indicators — uncommon outside of obfuscation

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0006_000.js` `fc0da50fa83d61d93aa53ddfb4802b835c90e40ba311f3a25e2e6ad9e9ba0156`	pdf-javascript-stream	PDF /JS object 6 at offset 0x138	1375 bytes

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