PDF malware analysis — malicious · 8c23d5e74c2d7fc8

MALICIOUS

PDF

6.9 KB

MD5: 345e9f4aae9d3ac05494eded6821b186 SHA-1: 44f2b986983bed026506da20b3fa1a48c8f33575 SHA-256: 8c23d5e74c2d7fc83a4bb2440e9812a9c9c5480e0a2ad706f0b2ecd7e341d15d

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. The critical CVE_2008_2992 heuristic suggests exploitation of a specific vulnerability. The embedded JavaScript, extracted as 'javascript_obj0006_000.js', is the primary artifact, and its presence strongly suggests the file's intent is to execute malicious code. The obfuscated nature and the use of unescape() point towards an attempt to conceal the 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` `d962705eb6ccf21b577d1729b306c2bd03f7d79a2882e7698828ab5fced309ee`	pdf-javascript-stream	PDF /JS object 6 at offset 0x195	5698 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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