PDF malware analysis — malicious · dd161368dcc8f75a

MALICIOUS

PDF

57.4 KB Created: 2011-01-14 00:19:32 +02:00 Authoring application: http://google.wiki.usfca.edu/ (via mPDF 5.0)

MD5: 11bfbfa74700828eb7ccd1d43ba26243 SHA-1: abca1746348149db7aa2708a9f43d136fbf9884e SHA-256: dd161368dcc8f75a1e2d5d4ef2d202ad7a25ea51eaf3603555bae4e55f8cba94

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file was flagged as malicious by an ML classifier and contains embedded JavaScript. The JavaScript stream, named 'javascript_obj0038_000.js', exhibits obfuscation and hex escape sequences, indicating a malicious intent to download and execute a secondary payload. The presence of PDF-specific heuristics further supports this assessment.

Machine Learning

Nyx PDF Classifier malicious score 0.9145

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` `a2620a0be21a26956e8296a3c8163c8c260cb6a920586f15a19c6e170ac30940`	pdf-javascript-stream	PDF /JS object 38 at offset 0xDD6D	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_off000021e4.bin` `bc8332b718138e0cfc96dd20cba478e6bf43bb7aace94324d9a1df4fbaaed14d`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x21E4	18228 bytes
`font_01_sfnt_off00005121.bin` `a8ed3909966b10c026f46212f55dce68c94667ce1ac039797d3ebfa1d644dacf`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5121	17892 bytes
`font_02_sfnt_off00007f61.bin` `4ee4e439b16220e78b319060a3d86ba95cd4b8614522dd4fa1d4df274793c516`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7F61	18720 bytes
`font_03_sfnt_off0000b1ee.bin` `e3eeacc5b1f780160b253f248c40fb29e5cb6416f62dd9413712ea70c37f26c9`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB1EE	18756 bytes

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