PDF malware analysis — malicious · 0fdc658415a7b2a6

MALICIOUS

PDF

326.2 KB Created: 2017-02-14 09:13:42 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 2.5.000_PHP4 (http://www.tcpdf.org))

MD5: c8089bb116314eb9e5d3d6b7cea4309f SHA-1: f54e881f07cdb15304c9c031228ec9b3fe6d8a4e SHA-256: 0fdc658415a7b2a6fba47210cbd83cfe5bf8a898f3cd3ab209f08601a5d54ba7

132 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file contains embedded JavaScript that triggers an eval() call, a common technique for executing arbitrary code. ClamAV detection as Unix.Trojan.PhpBackdoor-9354530-2 strongly suggests the payload is a PHP backdoor. The embedded URL, while confirmed benign, is likely a decoy or unrelated to the malicious functionality.

Machine Learning

Nyx PDF Classifier malicious score 0.9895

Heuristics 3

ClamAV: Unix.Trojan.PhpBackdoor-9354530-2 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Unix.Trojan.PhpBackdoor-9354530-2
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_004_off0000c18f.bin` `a5337ef1f5a0dfe4dc8fa6b4f3ef847a53624800b5928a0eeef5b888ceecaabc`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0xC18F	264072 bytes

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