PDF malware analysis — malicious · f84b246c6292f61e

MALICIOUS

PDF

6.3 KB

MD5: ed90df85f0f42b1424638aa482ec4e87 SHA-1: 0cf42e0b50cedf99ddcc93935115affdb05c3de7 SHA-256: f84b246c6292f61e34b555db387f0b20e4fd89de1d988905c703ed2036416e2a

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File T1070.004 File Deletion

This PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The critical CVE_2008_2992 heuristic firing suggests exploitation of a vulnerability related to util.printf. The unescape() call further points to obfuscated JavaScript. The embedded JavaScript stream, extracted as javascript_obj0006_000.js, is likely responsible for the malicious behavior, potentially downloading and executing a second-stage payload. The ClamAV detection confirms its malicious nature.

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` `def240f4945d34499048fcb5047eb40c5e8750c970fd69ae7ba87d3642ee3d27`	pdf-javascript-stream	PDF /JS object 6 at offset 0x1B7	5216 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 2 long base64-like blob(s).

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