PDF malware analysis — malicious · cc1dffb9690f3da8

MALICIOUS

PDF

40.5 KB Created: 2011-01-14 00:17:42 +02:00 Authoring application: http://google.wiki.usfca.edu/ (via mPDF 5.0)

MD5: fcbd86cb2ab7ce614cd46d32388b222a SHA-1: 3f9b15b59a3ddc59b03796a70b8187a69287955e SHA-256: cc1dffb9690f3da869e78e046423bb64a2c9cb14ab0d04d2061eb8a570977fc6

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 automatically navigate the user to '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 further malware.

Machine Learning

Nyx PDF Classifier malicious score 0.9981

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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0029_000.js` `a2620a0be21a26956e8296a3c8163c8c260cb6a920586f15a19c6e170ac30940`	pdf-javascript-stream	PDF /JS object 29 at offset 0x9B09	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_off00001328.bin` `dcd1ba64d747e0bf0b9b8ecc270a7bea07ca4cd5917a768cd217f1d51287033b`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x1328	17772 bytes
`font_01_sfnt_off00004143.bin` `a8ed3909966b10c026f46212f55dce68c94667ce1ac039797d3ebfa1d644dacf`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4143	17892 bytes
`font_02_sfnt_off00006f95.bin` `e3eeacc5b1f780160b253f248c40fb29e5cb6416f62dd9413712ea70c37f26c9`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6F95	18756 bytes

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