PDF malware analysis — malicious · 382ee39463c7d055

MALICIOUS

PDF

41.0 KB Created: 2012-09-11 16:55:32 +04:00 Authoring application: Wordpress.com (via mPDF 5.0)

MD5: e18d3dd79fda1b9c96e8057d10321c71 SHA-1: d4e4aaf42d513db715b88bda163516e4ff5798f0 SHA-256: 382ee39463c7d0554705fa2a014ee636730ba6e14b6ce8302e2835a4e809ca9f

68 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file was flagged as malicious by an ML classifier and contained embedded JavaScript. Heuristics indicate obfuscation and suspicious extracted artifacts, suggesting the script's purpose is to download and execute a second-stage payload. The document body was unreadable, preventing further analysis of its lure.

Machine Learning

Nyx PDF Classifier malicious score 0.9983

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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0029_000.js` `b549138dc1b00ea70ede2671460e6cd42d9e1c3bb812bf9653550df0951c4991`	pdf-javascript-stream	PDF /JS object 29 at offset 0x9BA4	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_off000013a9.bin` `ded1520fd68b91798ef4502ba393be29e6762be445da6319489229b957e57958`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x13A9	17756 bytes
`font_01_sfnt_off000041bb.bin` `a8ed3909966b10c026f46212f55dce68c94667ce1ac039797d3ebfa1d644dacf`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x41BB	17892 bytes
`font_02_sfnt_off00006ffb.bin` `4ee4e439b16220e78b319060a3d86ba95cd4b8614522dd4fa1d4df274793c516`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6FFB	18720 bytes

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