PDF malware analysis — malicious · 15de0db267466050

MALICIOUS

PDF

142.8 KB

MD5: 0ca2e311ab89e9723d5b9a967d2335d0 SHA-1: 28da12837c0cb60666f975777465f7f107805ec8 SHA-256: 15de0db267466050939e2093529cc8344b96c958d3507e8fcb413c01716f3ef4

198 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF sample contains embedded JavaScript and triggers the CVE-2010-2883 exploit for Adobe Reader. The JavaScript is heavily obfuscated but appears to be designed to download and execute a secondary payload. The ML classifier strongly indicates maliciousness.

Machine Learning

Nyx PDF Classifier malicious score 0.9979

Heuristics 8

Adobe Reader CoolType SING font exploit — CVE-2010-2883 critical CVE likely CVE_2010_2883

PDF embeds a TrueType/OpenType font with an actual SING table and pairs it with JavaScript heap-spray shellcode. This matches the public Adobe Reader CoolType SING exploit shape for CVE-2010-2883.
PDF JavaScript exploit cluster critical PDF_JS_EXPLOIT_CLUSTER

PDF combines an executable JavaScript/action surface with exploit staging indicators such as eval/unescape/fromCharCode, XFA script content, or a related CVE pattern. Benign form JavaScript remains low-severity, but this correlated cluster is high-confidence malicious behavior.
ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX

Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
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.
XFA form low PDF_XFA

PDF uses XML Forms Architecture — can contain script logic
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.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL http://ns.adobe.com/xdp/
- http://www.xfa.org/schema/xci/2.6/
- http://www.xfa.org/schema/xfa-template/2.1/

Extracted artifacts 5

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0038_000.js` `2c0b66ec50073178ddc3de2aaf0627ef83819a8f71c118ff3b075b4bd82749fe`	pdf-javascript-stream	PDF /JS object 38 at offset 0x1B82	1242 bytes
`javascript_obj0040_001.js` `f9e496c1483da2608e6b39e22282e8a3dc10e500f3f10b4aa5938424f3686e26`	pdf-javascript-stream	PDF /JS object 40 at offset 0x22737	15083 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 long base64-like blob(s).
`stream_004_off00000b11.bin` `69e17a0038b9273e6d005ef52313a832cb41b9cf9713d6134d0cf9f2e59298a7`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0xB11	434 bytes
`font_00_sfnt_off00001152.bin` `fc85f44193ccd402987935418c4f5fdf6802c96450b789e7fce04f9791933021`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1152	7965 bytes
`font_01_sfnt_off00001903.bin` `1e827515a464087cdace63e3578c118b45a657ed40cdbb9de7eead35c9b593ba`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1903	7965 bytes

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