PDF malware analysis — malicious · f6ee31f12fe2ac90

MALICIOUS

PDF

4.3 KB

MD5: 2c93060110e98a4e37588f1bfe65265a SHA-1: d175b7b576be431c1c83e269552814ac4f2a3b8d SHA-256: f6ee31f12fe2ac90cc9946c5adb5ee573a7f0716bfc9bd61a5f80c12a08cf23b

128 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File

The PDF sample contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The critical CVE_2008_2992 firing specifically points to the exploitation of a known vulnerability using a numeric character-code string decoded JavaScript. This script is designed to be evaluated, suggesting it's a downloader or initial execution stage for further malicious activity. No specific family could be identified, but the attack pattern is consistent with exploiting PDF reader vulnerabilities to deliver a 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. (identified after JavaScript deobfuscation)
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (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.
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules. (matched inside decoded stream)
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0005_000.js` `01a955d5ddd19c41c46e73a31396eacdc8894cf5ce5278b3cf78d80edf311b95`	pdf-javascript-stream	PDF /JS object 5 at offset 0x107	22807 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`numeric_charcode_stage_000.js` `2b7e0cd1e09ae71d8317f9b907686a48613c43a34b107c4b3eba70787cb818be`	deobfuscated-js	numeric char-code string decoded JavaScript at offset 0x115	6724 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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