Malicious PDF — malware analysis report

Static analysis result for SHA-256 60ef5eaf00306e59…

MALICIOUS

PDF

53.7 KB Created: 2011-01-14 00:17:43 +02:00 Authoring application: http://google.wiki.usfca.edu/ (via mPDF 5.0)
MD5: eca4c7a395985ac1ddc86a3f34e305f1 SHA-1: acbcb5590d75ed246953809d3d656aa8edd952eb SHA-256: 60ef5eaf00306e59a43c5c039b9355517fe2967899fdb6089369b44f4eed5858
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 utilizes the getURL function to redirect to 'http://searchglobalsite.com/in.cgi?17'. This behavior, combined with ML classifier and heuristic findings indicating obfuscated JavaScript and a potential redirector, strongly suggests the document is designed to lure the user to a malicious site. The primary purpose of this redirection is likely to initiate a download of a second-stage malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9305

Heuristics 5

  • 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.
  • 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?17
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0034_000.js
a2620a0be21a26956e8296a3c8163c8c260cb6a920586f15a19c6e170ac30940		 pdf-javascript-stream PDF /JS object 34 at offset 0xCF06 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_002_off00001433.bin
aebce41df72411959bc8905c2674450eeaeb886b81f32e38a41d9bdc97affa62		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1433 17916 bytes
font_01_sfnt_off000042ba.bin
a8ed3909966b10c026f46212f55dce68c94667ce1ac039797d3ebfa1d644dacf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x42BA 17892 bytes
font_02_sfnt_off000070fa.bin
4ee4e439b16220e78b319060a3d86ba95cd4b8614522dd4fa1d4df274793c516		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70FA 18720 bytes
font_03_sfnt_off0000a387.bin
e3eeacc5b1f780160b253f248c40fb29e5cb6416f62dd9413712ea70c37f26c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA387 18756 bytes

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