PDF malware analysis — malicious · cfd99d7280a5607c

MALICIOUS

PDF

56.6 KB Created: 2011-01-14 00:19:14 +02:00 Authoring application: http://google.wiki.usfca.edu/ (via mPDF 5.0)

MD5: 356f6ad4690e5a77aae75b7236a8029d SHA-1: a451b2a4d147382db03537c2e62bdacc83164269 SHA-256: cfd99d7280a5607c2a7548ba0863b6e1f0d56382773930863ffe673375bce399

106 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1566.001 Phishing: Spearphishing Attachment T1204.002 Malicious Link

The PDF contains obfuscated JavaScript that functions as a redirector. This script is designed to automatically navigate the user to the URL 'http://searchglobalsite.com/in.cgi?17'. The high confidence ML classifier and the specific heuristic for an obfuscated getURL redirector strongly indicate malicious intent, likely for phishing or to download a secondary payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9011

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 0xDA40	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_off00001fa6.bin` `a315129107d02afa1688d3b2fae696b95d7e58528d1b19e5dcd6f8a90a3951a7`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x1FA6	17844 bytes
`font_01_sfnt_off00004df4.bin` `a8ed3909966b10c026f46212f55dce68c94667ce1ac039797d3ebfa1d644dacf`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4DF4	17892 bytes
`font_02_sfnt_off00007c34.bin` `4ee4e439b16220e78b319060a3d86ba95cd4b8614522dd4fa1d4df274793c516`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7C34	18720 bytes
`font_03_sfnt_off0000aec1.bin` `e3eeacc5b1f780160b253f248c40fb29e5cb6416f62dd9413712ea70c37f26c9`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xAEC1	18756 bytes

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