PDF malware analysis — malicious · 3c620b44887b1c01

MALICIOUS

PDF

6.6 KB

MD5: d90a362ae5025cf80084c268f77ffe50 SHA-1: 4140a1fd82bb0382540ed7f59defc09a4943f871 SHA-256: 3c620b44887b1c01e021b96bc4bfc0b958b68a827c0278bebcc02b9e9cd67174

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File T1059.003 Windows Command Shell

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. The critical CVE_2008_2992 heuristic specifically points to the exploitation of a known vulnerability. The embedded JavaScript, identified as javascript_obj0006_000.js, is likely responsible for downloading and executing a secondary 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` `84a579cca4498c5e34156571406f2763d996a98988a328176d55b91d397e1473`	pdf-javascript-stream	PDF /JS object 6 at offset 0x199	5508 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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