PDF malware analysis — malicious · 8dc6789d1f0b5f21

MALICIOUS

PDF

6.8 KB

MD5: 952d600a518a0d391009b9c6452750ee SHA-1: 4fd0013125c8cc0bbc06eb54f54735bd62f4f8a2 SHA-256: 8dc6789d1f0b5f21b60c519c894dbeac587776c4a65b7c9962d3a3225ce83a7e

178 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.001 PowerShell T1059.007 JavaScript

The PDF file contains embedded JavaScript and triggers a critical vulnerability (CVE-2008-2992) related to util.printf. This indicates the document is designed to exploit this flaw to execute arbitrary code. The presence of obfuscated JavaScript and a suspicious extracted file (javascript_obj0006_000.js) further supports the malicious intent, likely for downloading and executing a second-stage payload.

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` `872aa6f67fd76590c62c2ba317eed6f0ff040856e54b986cb06049415c7a5cfa`	pdf-javascript-stream	PDF /JS object 6 at offset 0x195	5863 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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