PDF malware analysis — malicious · 529cded3da4df81c

MALICIOUS

PDF

55.7 KB Created: 2011-01-14 00:17:16 +02:00 Authoring application: http://google.wiki.usfca.edu/ (via mPDF 5.0)

MD5: f4c32ad11fe96638b377355fa1b25702 SHA-1: 16609e480ae5406ff08d90f545de835dcd8b9baa SHA-256: 529cded3da4df81c336bb3b238def5613178df3058184dcc432f9d6e40d078b9

106 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1566.002 Spearphishing Attachment

The PDF contains obfuscated JavaScript that acts as a redirector. This script is designed to navigate the user to the URL http://searchglobalsite.com/in.cgi?17, likely to deliver a malicious payload or phish for credentials. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

Nyx PDF Classifier malicious score 0.9174

Heuristics 4

Obfuscated document JavaScript getURL redirector high PDF_JS_OBFUSCATED_GETURL_REDIRECTOR

PDF document-level JavaScript automatically calls getURL() on an HTTP(S) destination hidden behind percent escapes. The decoded path is a redirector-style endpoint such as /in.cgi or /go.php. This is malicious routing behavior rather than a PDF parser CVE.
Suspicious extracted artifact medium 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.
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 5

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0036_000.js` `a2620a0be21a26956e8296a3c8163c8c260cb6a920586f15a19c6e170ac30940`	pdf-javascript-stream	PDF /JS object 36 at offset 0xD747	136 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 1 long hex-escaped blob(s).
`stream_003_off00001c83.bin` `4a9dced27b805bcc60a50293e13d4871390d23453e3e26af192ea9df8de24ef7`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x1C83	17940 bytes
`font_01_sfnt_off00004afb.bin` `a8ed3909966b10c026f46212f55dce68c94667ce1ac039797d3ebfa1d644dacf`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4AFB	17892 bytes
`font_02_sfnt_off0000793b.bin` `4ee4e439b16220e78b319060a3d86ba95cd4b8614522dd4fa1d4df274793c516`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x793B	18720 bytes
`font_03_sfnt_off0000abc8.bin` `e3eeacc5b1f780160b253f248c40fb29e5cb6416f62dd9413712ea70c37f26c9`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xABC8	18756 bytes

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