PDF malware analysis — malicious · 8c46d6a306803a51

MALICIOUS

PDF

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

MD5: f395cf10746b72faadd4e5ce47311592 SHA-1: 0ee102d6beb60aa9212d1233b24d5efc37738808 SHA-256: 8c46d6a306803a51fe37903098a7718d72db24f04b8e79cf0cd31815d704625c

106 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1566.001 Spearphishing Attachment T1071.001 Web Protocols

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. This behavior is characteristic of phishing or malware distribution lures. The ML classifier also strongly indicated maliciousness.

Machine Learning

Nyx PDF Classifier malicious score 0.9008

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_obj0038_000.js` `a2620a0be21a26956e8296a3c8163c8c260cb6a920586f15a19c6e170ac30940`	pdf-javascript-stream	PDF /JS object 38 at offset 0xDB36	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_004_off000020cf.bin` `dcd1ba64d747e0bf0b9b8ecc270a7bea07ca4cd5917a768cd217f1d51287033b`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x20CF	17772 bytes
`font_01_sfnt_off00004eea.bin` `a8ed3909966b10c026f46212f55dce68c94667ce1ac039797d3ebfa1d644dacf`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4EEA	17892 bytes
`font_02_sfnt_off00007d2a.bin` `4ee4e439b16220e78b319060a3d86ba95cd4b8614522dd4fa1d4df274793c516`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7D2A	18720 bytes
`font_03_sfnt_off0000afb7.bin` `e3eeacc5b1f780160b253f248c40fb29e5cb6416f62dd9413712ea70c37f26c9`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xAFB7	18756 bytes

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