PDF malware analysis — malicious · 6d7170cb199243ec

MALICIOUS

PDF

239.1 KB Created: 2014-02-05 15:09:36 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 2.5.000_PHP4 (http://www.tcpdf.org))

MD5: fd5531fb739df6b7cb439d6e15e8f5d3 SHA-1: fae2f830c1bd57acd77df41642b944917032b90b SHA-256: 6d7170cb199243ec2206251c9966a1bc499c9f8ebf096a620095a22e1eccdac1

114 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The file is identified as a malicious PDF by multiple heuristics, including a critical ClamAV detection and an ML classifier. The presence of an embedded script payload, flagged by heuristics, suggests the PDF is designed to exploit a vulnerability and likely download a secondary payload. The embedded URL, while confirmed benign, is noted as present within the document text.

Machine Learning

Nyx PDF Classifier malicious score 0.9551

Heuristics 4

ClamAV: Pdf.Dropper.Agent-7402766-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7402766-0
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.
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.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.

URL http://www.gnu.org/copyleft/gpl.html

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_002_off0000b863.bin` `a5337ef1f5a0dfe4dc8fa6b4f3ef847a53624800b5928a0eeef5b888ceecaabc`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0xB863	264072 bytes
`embedded_pdf_script_0003aae9.bin` `f922cddaf5043ba84c924433e9d30e56e7c245fef58369081498c2e9db057fa4`	pdf-embedded-script	PDF decompressed stream script payload at offset 0x3AAE9	244845 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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