PDF malware analysis — malicious · f6f919fc7c2323b1

MALICIOUS

PDF

241.8 KB Created: 2013-12-02 11:06:27 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 2.5.000_PHP4 (http://www.tcpdf.org))

MD5: b62e159855199cf1fef107ec24442cf4 SHA-1: dc07425e549934fc8cdb8b38432bc060fd197bb0 SHA-256: f6f919fc7c2323b1688d4cd9e9c0d92f8c2d56a2fc3640c09bf8f762b744f4be

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 payload, identified as 'embedded_pdf_script_0003b5b8.bin', is likely designed to download and execute a second-stage payload. The presence of JavaScript actions and embedded script payloads strongly suggests a malicious intent, likely for malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9304

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_003_off0000c310.bin` `a5337ef1f5a0dfe4dc8fa6b4f3ef847a53624800b5928a0eeef5b888ceecaabc`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0xC310	264072 bytes
`embedded_pdf_script_0003b5b8.bin` `ab0041c1a1dd079ae8fd1cfb14d124159508c88f4ed9064cb507b4b30dafaf6b`	pdf-embedded-script	PDF decompressed stream script payload at offset 0x3B5B8	247612 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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