PDF malware analysis — malicious · ed58cc024129a290

MALICIOUS

PDF

4.2 KB

MD5: 187169c6ea8c5bc9418faf9d71c91faa SHA-1: b96aa8a085995ea4523e928863bb5fa378708528 SHA-256: ed58cc024129a290b00f2094a1535b64e84018ca03ef720a81cad0fe5f54dbae

126 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, which is heavily obfuscated and utilizes `eval()` and `String.fromCharCode()`. Critical heuristics indicate the use of `util.printf` to exploit CVE-2008-2992, a known vulnerability for PDF JavaScript execution. The deobfuscated JavaScript stream, named 'numeric_charcode_stage_000.js', likely downloads and executes a second-stage payload, as suggested by the heuristic 'Suspicious extracted artifact'. The exact nature of the payload is not discernible from the provided evidence.

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` `e2ad562ac5434af0e50fc64bacdc8607838fee60d4f8d8fb42e00598e9e8bc90`	pdf-javascript-stream	PDF /JS object 5 at offset 0x107	22140 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` `dceda9f6e60f6579ac409a4878634a88079bb9b1021af3e6d02224daeb0aae58`	deobfuscated-js	numeric char-code string decoded JavaScript at offset 0x115	6512 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).

Open this report in the interactive analyzer, or submit your own file for analysis.