PDF malware analysis — malicious · 75fedfcfd507935e

MALICIOUS

PDF

40.6 KB Created: 2012-09-15 11:29:37 +04:00 Authoring application: Wordpress.com (via mPDF 5.0)

MD5: b05470c2851222f51e07923a5e9ec5ea SHA-1: 9a2073f515f07b55c462d00d30e122f213cd0c58 SHA-256: 75fedfcfd507935eac155dc3d4bcafc3f4982d3abf1c5cc08aa13d16bf4dcbb3

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The ML classifier strongly flags this PDF as malicious. The extracted artifact 'javascript_obj0029_000.js' shows signs of obfuscation, suggesting it is designed to perform malicious actions such as downloading and executing a second-stage payload. The document body is unreadable due to encoding issues, but the presence of executable JavaScript is a strong indicator of malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9981

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` `cd6097ae9725eedeb8d68162b4d969180785ce4cb6006439670b9637b33de890`	pdf-javascript-stream	PDF /JS object 29 at offset 0x9A7C	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_off00001281.bin` `ded1520fd68b91798ef4502ba393be29e6762be445da6319489229b957e57958`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x1281	17756 bytes
`font_01_sfnt_off00004093.bin` `a8ed3909966b10c026f46212f55dce68c94667ce1ac039797d3ebfa1d644dacf`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4093	17892 bytes
`font_02_sfnt_off00006ed3.bin` `4ee4e439b16220e78b319060a3d86ba95cd4b8614522dd4fa1d4df274793c516`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6ED3	18720 bytes

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