PDF malware analysis — malicious · 3ff45a6c908eb83f

MALICIOUS

PDF

5.9 KB

MD5: 3e208e5e41064531fcc74fa9330ee833 SHA-1: 408e0e2f4befc1eb2b1ce33b693abd9d95082069 SHA-256: 3ff45a6c908eb83fe5c3d8b2c79edc151dd69acbeb759b4965f189231e6ebb73

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.002 Malicious JavaScript

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. The critical CVE_2008_2992 firing suggests exploitation of a known PDF vulnerability. The unescape() call and obfuscation indicators point to the JavaScript being used to download and execute a secondary payload. No specific family could be identified, but the attack pattern is consistent with a malicious PDF dropper.

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` `34d63336db3f91b28111f63417fbf9a54561411dbc40742f550c25b752015daf`	pdf-javascript-stream	PDF /JS object 6 at offset 0x197	5203 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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