PDF malware analysis — malicious · aa78d9d23ba97bd1

MALICIOUS

PDF

6.7 KB

MD5: 1c963199700d8b78b94ed496118e81cb SHA-1: 6f0fc7b56b107f3b1e2fa11f8604823d079ac8ec SHA-256: aa78d9d23ba97bd1df34a545c61c6fbfb645ed22d5899e4fa204b388e668a156

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript 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 document is designed to exploit this vulnerability to execute arbitrary code. The ClamAV detection further supports its malicious nature. No document body text was available for analysis, but the script execution is the primary indicator of malicious intent.

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` `3e4570982b188fbdc189c700c09dd98c1e076b1a6ff6db89f7319eeeec5c2c93`	pdf-javascript-stream	PDF /JS object 6 at offset 0x1B3	5607 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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