PDF malware analysis — malicious · a97535189f7173e8

MALICIOUS

PDF

5.5 KB

MD5: f4f0e3fd5fcaa5868b0ffecf90bfe317 SHA-1: c4ebbfdb308bfe15f80f94ff504b14ad6a312a45 SHA-256: a97535189f7173e8c6a611cda51048961a5f148eb25dd535bdccf5ce8d6d5188

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.002 Malicious File

The sample is a PDF file that contains embedded JavaScript. Heuristics indicate the use of unescape() and a specific exploit (CVE-2008-2992) targeting util.printf. This suggests the document is designed to leverage this vulnerability to execute arbitrary code. The embedded JavaScript stream and the ClamAV detection further support its malicious nature. The primary IOC is the CVE identifier, as no specific URLs or hashes were extracted.

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` `f4b0cd3a993e1478d8c7a3b32ab0202320b95e98c42a99839687e33a36975163`	pdf-javascript-stream	PDF /JS object 6 at offset 0x19B	4785 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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