PDF malware analysis — malicious · 9901070dfb694f06

MALICIOUS

PDF

57.1 KB Created: 2011-01-14 00:19:16 +02:00 Authoring application: http://google.wiki.usfca.edu/ (via mPDF 5.0)

MD5: 99d1dd961c3737c443a320a3d7b33ba2 SHA-1: 627bb83307f73da4e167027f5e422d4541167f62 SHA-256: 9901070dfb694f06c92fb7b50a8bb0b8cc0bd0767818ec72d7e96678c068e175

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The ML classifier also flagged it as malicious. The extracted JavaScript file, 'javascript_obj0036_000.js', likely contains obfuscated code designed to download and execute a secondary payload, a common technique for initial access.

Machine Learning

Nyx PDF Classifier malicious score 0.9148

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_obj0036_000.js` `a2620a0be21a26956e8296a3c8163c8c260cb6a920586f15a19c6e170ac30940`	pdf-javascript-stream	PDF /JS object 36 at offset 0xDC8A	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_003_off0000212b.bin` `c5f0de032abc6724d51f70d976d3ea0dd6d0a92bcdc046774f16a9243c8095d6`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x212B	18124 bytes
`font_01_sfnt_off0000503e.bin` `a8ed3909966b10c026f46212f55dce68c94667ce1ac039797d3ebfa1d644dacf`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x503E	17892 bytes
`font_02_sfnt_off00007e7e.bin` `4ee4e439b16220e78b319060a3d86ba95cd4b8614522dd4fa1d4df274793c516`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7E7E	18720 bytes
`font_03_sfnt_off0000b10b.bin` `e3eeacc5b1f780160b253f248c40fb29e5cb6416f62dd9413712ea70c37f26c9`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB10B	18756 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.