PDF malware analysis — malicious · fe9867fb738181bb

MALICIOUS

PDF

6.2 KB

MD5: f99a94bd91b43e179edde17560c2b7d3 SHA-1: 022a9564756efb35629d8aaa6e9c8582d87ea3bc SHA-256: fe9867fb738181bbbc422f85e9c46e4d4f489873e0977603d895e2e0de55e2ad

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The critical CVE_2008_2992 heuristic firing suggests exploitation of a known PDF vulnerability using util.printf. The embedded JavaScript stream, identified as javascript_obj0006_000.js, is likely responsible for the malicious activity. The ClamAV detection further confirms its malicious nature. The primary attack vector appears to be exploiting a PDF reader vulnerability to achieve code execution.

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` `9c9fea8bc7e8b8cd34c146101fafad46db7e0ef4ca49c631d7bfacd00c6bf102`	pdf-javascript-stream	PDF /JS object 6 at offset 0x19F	5156 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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