PDF malware analysis — malicious · 52073742b442a348

MALICIOUS

PDF

41.0 KB Created: 2012-09-11 16:55:38 +04:00 Authoring application: Wordpress.com (via mPDF 5.0)

MD5: ef20f3e5622e13456843e92fc4fc99e5 SHA-1: 59ddd9143aa169077db6ec27714db6bb40b0b7b2 SHA-256: 52073742b442a3486c3aa2522b8961fd43173184f260687ae9099138fefc6bff

106 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1566.002 Spearphishing Attachment

The PDF contains obfuscated JavaScript that functions as a redirector. The primary heuristic indicates this script attempts to use getURL to redirect to 'http://globalsearchings.com/in.cgi?16'. This is a common technique for phishing or malware delivery. The ML classifier strongly supports the malicious nature of the PDF.

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` `b549138dc1b00ea70ede2671460e6cd42d9e1c3bb812bf9653550df0951c4991`	pdf-javascript-stream	PDF /JS object 29 at offset 0x9BB9	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_off000013be.bin` `ded1520fd68b91798ef4502ba393be29e6762be445da6319489229b957e57958`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x13BE	17756 bytes
`font_01_sfnt_off000041d0.bin` `a8ed3909966b10c026f46212f55dce68c94667ce1ac039797d3ebfa1d644dacf`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x41D0	17892 bytes
`font_02_sfnt_off00007010.bin` `4ee4e439b16220e78b319060a3d86ba95cd4b8614522dd4fa1d4df274793c516`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7010	18720 bytes

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