PDF malware analysis — malicious · 80c482acf7f532ae

MALICIOUS

PDF

239.0 KB Created: 2014-02-12 15:15:32 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 2.5.000_PHP4 (http://www.tcpdf.org))

MD5: 27904c1fdaff32b9f7fd51b6804c13bb SHA-1: 16ef62d6b5b688566457362714899b9373238d87 SHA-256: 80c482acf7f532ae6fe21d69d52935d48d0863d759710c00169cc07e5ab20a72

60 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file was flagged by a machine learning classifier as malicious and contains embedded JavaScript. The embedded script is likely intended to download and execute a second-stage payload. The presence of JavaScript actions and embedded script payloads strongly suggests malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9551

Heuristics 3

Embedded script payload in PDF stream medium PDF_EMBEDDED_SCRIPT_PAYLOAD

PDF stream bytes contain an HTML/XFA <script> tag without accompanying Windows shell-execution primitives — common in accessible XFA forms but worth surfacing for analyst review.
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.
Suspicious extracted artifact info 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.

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_002_off0000b81f.bin` `a5337ef1f5a0dfe4dc8fa6b4f3ef847a53624800b5928a0eeef5b888ceecaabc`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0xB81F	264072 bytes
`embedded_pdf_script_0003aa99.bin` `3cf8262c60338d4ccec26a1541c4cfe50a5318d65677143094b0ec5abd9fdb0b`	pdf-embedded-script	PDF decompressed stream script payload at offset 0x3AA99	244765 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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