PDF malware analysis — malicious · cae16bb18f4d80bf

MALICIOUS

PDF

5.8 KB

MD5: 8804f0aee8501362694f739f700172fc SHA-1: b2f62184e571be9c8d28c9b9fed699ac876a220b SHA-256: cae16bb18f4d80bf229d452c4eeae757ffaa4fff90cf2b4493cbb5caeaf82e5d

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. The critical CVE_2008_2992 heuristic firing suggests the exploitation of a known vulnerability within the PDF reader. The embedded JavaScript stream, identified as javascript_obj0006_000.js, was further processed and found to contain an unescape() call, a common obfuscation technique. This indicates the script is likely designed to download and execute a secondary payload, a common attack pattern for PDF-based malware.

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` `6f6bd2187182786425fc2758bfdcd7cfc15cac5ec2d3c61cb0545beb3ffb4f7e`	pdf-javascript-stream	PDF /JS object 6 at offset 0x1A9	5059 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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