PDF malware analysis — malicious · d2810ef33d33ee97

MALICIOUS

PDF

54.5 KB Created: 2012-05-14 14:35:36 +04:00 Authoring application: Drupal.org (via mPDF 5.0)

MD5: 1e3470d2db93328fd209fff70733d7dd SHA-1: 1d554788be7f228de03c97973d3c66fd10367300 SHA-256: d2810ef33d33ee979a1ea7528027fe35705d2dff52f927cd0b1c90a18966a7f6

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, as indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. The ML classifier also flagged this PDF as malicious with a high score. The extracted artifact 'javascript_obj0038_000.js' suggests the presence of obfuscated JavaScript, likely intended to download and execute a second-stage payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9435

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` `df7e0affd237ec8d83f2947a5a6b8abd8fdb1a8dcb1a8ff2d1b4022d2913ab67`	pdf-javascript-stream	PDF /JS object 38 at offset 0xD146	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_off000016e8.bin` `ded1520fd68b91798ef4502ba393be29e6762be445da6319489229b957e57958`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x16E8	17756 bytes
`font_01_sfnt_off000044fa.bin` `a8ed3909966b10c026f46212f55dce68c94667ce1ac039797d3ebfa1d644dacf`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x44FA	17892 bytes
`font_02_sfnt_off0000733a.bin` `4ee4e439b16220e78b319060a3d86ba95cd4b8614522dd4fa1d4df274793c516`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x733A	18720 bytes
`font_03_sfnt_off0000a5c7.bin` `e3eeacc5b1f780160b253f248c40fb29e5cb6416f62dd9413712ea70c37f26c9`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA5C7	18756 bytes

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