PDF malware analysis — malicious · 80878a2a63d9f784

MALICIOUS

PDF

6.5 KB

MD5: bae2931cb9401365208e3d5f53ea64e7 SHA-1: 6f2e3adf46636078dbf881465aba25fc5662dc9b SHA-256: 80878a2a63d9f784a87d8adcece7b3ea9f0579599e071eebedffdbd047c6a66f

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 presence of the CVE-2008-2992 heuristic, specifically mentioning util.printf, strongly suggests exploitation of this known PDF vulnerability. The unescape() call further points to obfuscated JavaScript intended to conceal malicious actions. The extracted JavaScript file, javascript_obj0006_000.js, likely contains code to download and execute a secondary payload, although its exact contents are not detailed here. The ClamAV detection confirms the malicious nature of the file.

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` `311fe5fa022bf23ab13a79f35486846aeb71d5b8b981e18cfb57ebad54772703`	pdf-javascript-stream	PDF /JS object 6 at offset 0x19F	5455 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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