PDF malware analysis — malicious · d588f1ce4927abd5

MALICIOUS

PDF

4.3 KB

MD5: 6143f0fe8c6b2896d51e5352fe66baa5 SHA-1: a29e82be2387085feca4be4d231650a2e0b5e190 SHA-256: d588f1ce4927abd5c1b2cad29728f1eabb4374b3224dc82a75494928d92d98a7

176 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript that utilizes the eval() function and String.fromCharCode, indicating obfuscated code execution. The critical CVE-2008-2992 heuristic firing confirms the exploitation of this vulnerability via util.printf. The embedded JavaScript streams, particularly 'numeric_charcode_stage_000.js', are likely responsible for downloading and executing a second-stage payload. The lack of readable document body text prevents a more specific determination of the lure, but the technical indicators strongly suggest a malicious exploit delivery.

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)
Suspicious extracted artifact high 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.
String.fromCharCode medium PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically (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.

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0005_000.js` `c8757172d8408de5b297f0afa3641ad507ea0d8c882ee599ff495a82b8f4abf2`	pdf-javascript-stream	PDF /JS object 5 at offset 0x107	21128 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` `f91bde724428d69823a918a2959ceb964c50936ef96ada618cf71c8f43bca630`	deobfuscated-js	numeric char-code string decoded JavaScript at offset 0x115	6205 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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