PDF malware analysis — malicious · ad4203765692f3e6

MALICIOUS

PDF

5.8 KB

MD5: c72f57c6f13c8eb1317296b49a16ec9b SHA-1: 2b98b421dffb86784a54f3c9e4c982b89653a9fb SHA-256: ad4203765692f3e69f6db9c2992c5e863db5fa6bf808c8b6e7b845ffa64e797a

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 a CVE_2008_2992 (util.printf) firing strongly suggests exploitation of this vulnerability. The ClamAV detection and the 'Suspicious extracted artifact' heuristic further support a malicious classification. The embedded JavaScript is likely used to download and execute a second-stage payload, a common technique for initial access.

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` `633c0c0bbcb20e5bfbdeb56222eecb99cf66d1e72ac51dbdb2b1b066eb00d90c`	pdf-javascript-stream	PDF /JS object 6 at offset 0x191	5015 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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