PDF malware analysis — malicious · 3c147356af93da6b

MALICIOUS

PDF

5.9 KB

MD5: 9d32ec3275d77d9d964afba9d1da6673 SHA-1: cd63a50e879ecb6d39dbb3f6d48b150a0e3ffc56 SHA-256: 3c147356af93da6b90ead61fbb5a25496a125e0a596f80589f870f7b9f9d429b

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/Shell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. A critical heuristic identified the CVE-2008-2992 exploit, which targets a vulnerability in PDF readers related to the util.printf function. The presence of obfuscated JavaScript and a critical ClamAV detection further support its malicious nature. The embedded JavaScript is likely responsible for executing the exploit.

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` `c0395cd6b70c72c351242d62b066ebf3a92954f606351baab926c41362834868`	pdf-javascript-stream	PDF /JS object 6 at offset 0x1A7	4964 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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