PDF malware analysis — malicious · c36ae64d3faea2f6

MALICIOUS

PDF

6.4 KB

MD5: d1a58b4bc65182b62e90f32180ca7bf1 SHA-1: 99e0f6fb349f113e2c1e3a7549e19c048de73d88 SHA-256: c36ae64d3faea2f60bfcb09f4f241b9b4f0eb65597a8d06e9c4bde0e34d5fb22

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. A critical finding is the exploitation of CVE-2008-2992 via a util.printf call within a JavaScript stream. This suggests the primary intent is to leverage this known vulnerability to execute arbitrary code, likely for downloading and executing a secondary payload. The ClamAV detection further supports the malicious nature of the file.

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` `4e9fc2a3cbbbc25a18ee079577baa087d53e0a7ae19184841dccdd09110a4c18`	pdf-javascript-stream	PDF /JS object 6 at offset 0x191	5348 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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