PDF malware analysis — malicious · 4e142b632240ea65

MALICIOUS

PDF

239.0 KB Created: 2014-02-05 15:09:42 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 2.5.000_PHP4 (http://www.tcpdf.org))

MD5: 5222239c314d3872e454768898cb65e4 SHA-1: f932388098de0a609d59acbf68e16aa184277b3c SHA-256: 4e142b632240ea65086359aeb9aa30448a485a0afacf23aa73ab87f3b97f6f48

90 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The critical ClamAV heuristic firing indicates this PDF is recognized as a dropper. The presence of embedded JavaScript, confirmed by heuristics and the extracted artifact, strongly suggests the document's purpose is to execute malicious code. The JavaScript is likely responsible for downloading and executing a secondary payload, a common technique for PDF-based malware delivery.

Heuristics 4

ClamAV: Pdf.Dropper.Agent-7145612-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7145612-0
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` `5af65e2362e4e7b6a4bd1b39aa5a98696df4bce62782e70c5f381c1c0306663e`	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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