PDF malware analysis — malicious · 271863728b77346a

MALICIOUS

PDF

6.2 KB

MD5: 0ca07a6c060a769edaa88a58dda791dd SHA-1: fba38a9b6fc8104cc1d3d3a4d44fd2dc5663ae31 SHA-256: 271863728b77346ab61c08f38ba380049f54197b35a5974cbc8511fd6bbac404

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. A critical heuristic, CVE_2008_2992, specifically points to the exploitation of a known vulnerability using a printf function within the JavaScript. The presence of obfuscated JavaScript and the ClamAV detection further support malicious intent. The primary attack vector appears to be the exploitation of CVE-2008-2992 to execute arbitrary code, 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` `ede00e636a88450cb14a91bcb4c1b6a5e46ab347450313132b13195c2a352650`	pdf-javascript-stream	PDF /JS object 6 at offset 0x197	5129 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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