PDF malware analysis — malicious · ed5e66e60e859b99

MALICIOUS

PDF

54.8 KB Created: 2012-09-22 12:17:37 +04:00 Authoring application: Wordpress.com (via mPDF 5.0)

MD5: 1dd0270e86af6fbd19e382528061f058 SHA-1: 4160d541ee8b4fdb233b988cf3adfa207c2bc56a SHA-256: ed5e66e60e859b9975aa6945c932e7922c608a5d1ac62766af7ab3ef51e56011

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file was flagged as malicious by a machine learning classifier and contains embedded JavaScript. The JavaScript stream, named 'javascript_obj0038_000.js', exhibits obfuscation indicators. This suggests the script is designed to perform malicious actions, likely downloading and executing a secondary payload, which is a common technique for malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9103

Heuristics 3

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 5

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0038_000.js` `be63095b36d2a7a6bb2354eee6ea8f866bd67eb57984a872fcac65a5a9d7a885`	pdf-javascript-stream	PDF /JS object 38 at offset 0xD246	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_004_off000017e8.bin` `ded1520fd68b91798ef4502ba393be29e6762be445da6319489229b957e57958`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x17E8	17756 bytes
`font_01_sfnt_off000045fa.bin` `a8ed3909966b10c026f46212f55dce68c94667ce1ac039797d3ebfa1d644dacf`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x45FA	17892 bytes
`font_02_sfnt_off0000743a.bin` `4ee4e439b16220e78b319060a3d86ba95cd4b8614522dd4fa1d4df274793c516`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x743A	18720 bytes
`font_03_sfnt_off0000a6c7.bin` `e3eeacc5b1f780160b253f248c40fb29e5cb6416f62dd9413712ea70c37f26c9`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA6C7	18756 bytes

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