PDF malware analysis — malicious · 918fc28c7978add8

MALICIOUS

PDF

6.7 KB

MD5: 9265b737735db2fda972ee27aae25bdf SHA-1: 56351c031c618eec18aa950ef66b4a674e6bb5df SHA-256: 918fc28c7978add832be59b3b8e4384f548777fdf3e4f6308a96a8c5ab776237

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript and triggers a critical vulnerability (CVE-2008-2992) related to JavaScript execution. The presence of a JavaScript action and an embedded JS stream, along with ClamAV's detection of obfuscated objects, strongly suggests malicious intent. The primary function appears to be exploiting this vulnerability to run arbitrary code, likely for downloading and executing further malicious content.

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` `b934102efef3132ade274513f92ddf67b886e2f42ba132c18687b654afb1456d`	pdf-javascript-stream	PDF /JS object 6 at offset 0x193	5644 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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