PDF malware analysis — malicious · ab81e7c07f87608b

MALICIOUS

PDF

40.9 KB Created: 2012-11-25 13:26:31 +04:00 Authoring application: Java.net (via mPDF 5.0)

MD5: 36acfbfc19c88308349724a4f5aaaa6e SHA-1: 1f380b9ff30083642f5eed9f93a539a9bb7d71c3 SHA-256: ab81e7c07f87608b28a07b5fbc7fdf1fc8ce89dc79ec4789c7ef7e8a0ef94bc9

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, flagged by multiple heuristics, which is designed to redirect the user to 'http://globalsearchings.com/in.cgi?18'. This behavior strongly suggests an attempt to lure the user to a malicious site, likely for phishing or to download a secondary payload. The ML classifier also indicates a high probability of maliciousness.

Machine Learning

Nyx PDF Classifier malicious score 0.9983

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` `76d3bb447acd5b45376b0e8b83aa4aa0566d30e3dffb5ca563e124aa7ad84a28`	pdf-javascript-stream	PDF /JS object 29 at offset 0x9C19	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_off0000141e.bin` `ded1520fd68b91798ef4502ba393be29e6762be445da6319489229b957e57958`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x141E	17756 bytes
`font_01_sfnt_off00004230.bin` `a8ed3909966b10c026f46212f55dce68c94667ce1ac039797d3ebfa1d644dacf`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4230	17892 bytes
`font_02_sfnt_off00007070.bin` `4ee4e439b16220e78b319060a3d86ba95cd4b8614522dd4fa1d4df274793c516`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7070	18720 bytes

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